K87() is    set 
 
K10(K87()) is    set 
 
K178() is   non  empty   strict   TopSpace-like   TopStruct 
 
 the carrier of K178() is   non  empty   set 
 
 {}  is   empty   set 
 
1 is   non  empty   set 
 
T is    set 
 
K10(T) is    set 
 
X1 is    Element of K10(T)
 
X2 is    Element of K10(T)
 
X1 \ X2 is    Element of K10(T)
 
Y1 is    Element of K10(T)
 
Y1 \ X2 is    Element of K10(T)
 
T is    set 
 
X1 is    set 
 
T /\ X1 is    set 
 
X2 is    set 
 
(T /\ X1) \ X2 is    Element of K10((T /\ X1))
 
K10((T /\ X1)) is    set 
 
T \ X2 is    Element of K10(T)
 
K10(T) is    set 
 
X1 \ X2 is    Element of K10(X1)
 
K10(X1) is    set 
 
(T \ X2) /\ (X1 \ X2) is    Element of K10(X1)
 
(T \ X2) /\ X1 is    Element of K10(T)
 
(T \ X2) \ X1 is    Element of K10(T)
 
(T \ X2) \ ((T \ X2) \ X1) is    Element of K10(T)
 
X2 \/ X1 is    set 
 
T \ (X2 \/ X1) is    Element of K10(T)
 
(T \ X2) \ (T \ (X2 \/ X1)) is    Element of K10(T)
 
(T \ X2) \ T is    Element of K10(T)
 
(T \ X2) /\ (X2 \/ X1) is    Element of K10(T)
 
((T \ X2) \ T) \/ ((T \ X2) /\ (X2 \/ X1)) is    Element of K10(T)
 
{} \/ ((T \ X2) /\ (X2 \/ X1)) is    set 
 
(X1 \ X2) \/ X2 is    set 
 
(T \ X2) /\ ((X1 \ X2) \/ X2) is    Element of K10(T)
 
(T \ X2) /\ X2 is    Element of K10(T)
 
((T \ X2) /\ (X1 \ X2)) \/ ((T \ X2) /\ X2) is    set 
 
((T \ X2) /\ (X1 \ X2)) \/ {} is    set 
 
T is    TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    SubSpace of T
 
 the carrier of X1 is    set 
 
 [#] T is   non  proper   Element of K10( the carrier of T)
 
K10(([#] T)) is    set 
 
 [#] X1 is   non  proper   Element of K10( the carrier of X1)
 
K10( the carrier of X1) is    set 
 
X2 is    Element of K10(([#] T))
 
T is    TopStruct 
 
 [#] T is   non  proper   Element of K10( the carrier of T)
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
 the topology of T is    Element of K10(K10( the carrier of T))
 
K10(K10( the carrier of T)) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X1 /\ ([#] T) is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X2 /\ ([#] T) is    Element of K10( the carrier of T)
 
T is   strict   TopStruct 
 
 [#] T is   non  proper   Element of K10( the carrier of T)
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
T | ([#] T) is   strict   SubSpace of T
 
X1 is    SubSpace of T
 
 [#] X1 is   non  proper   Element of K10( the carrier of X1)
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
X2 is    Element of K10( the carrier of T)
 
T | X2 is   strict   SubSpace of T
 
T is   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like   SubSpace of T
 
 the carrier of X1 is    set 
 
X2 is   TopSpace-like   SubSpace of T
 
 the carrier of X2 is    set 
 
 [#] X1 is   non  proper   open   closed   Element of K10( the carrier of X1)
 
K10( the carrier of X1) is    set 
 
 [#] X2 is   non  proper   open   closed   Element of K10( the carrier of X2)
 
K10( the carrier of X2) is    set 
 
 the topology of X1 is   non  empty   Element of K10(K10( the carrier of X1))
 
K10(K10( the carrier of X1)) is    set 
 
 the topology of X2 is   non  empty   Element of K10(K10( the carrier of X2))
 
K10(K10( the carrier of X2)) is    set 
 
C2 is    Element of K10( the carrier of X1)
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
 the topology of T is   non  empty   Element of K10(K10( the carrier of T))
 
K10(K10( the carrier of T)) is    set 
 
C1 is    Element of K10( the carrier of T)
 
C1 /\  the carrier of X1 is    Element of K10( the carrier of T)
 
C1 /\  the carrier of X2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of X2)
 
A1 /\  the carrier of X1 is    Element of K10( the carrier of X2)
 
 the carrier of X2 /\  the carrier of X1 is    set 
 
C1 /\ ( the carrier of X2 /\  the carrier of X1) is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of X2)
 
C1 /\  the carrier of X1 is    Element of K10( the carrier of X2)
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
 the topology of T is   non  empty   Element of K10(K10( the carrier of T))
 
K10(K10( the carrier of T)) is    set 
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ ([#] X2) is    Element of K10( the carrier of X2)
 
 the carrier of X2 /\  the carrier of X1 is    set 
 
A1 /\ ( the carrier of X2 /\  the carrier of X1) is    Element of K10( the carrier of T)
 
A1 /\  the carrier of X1 is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
X1 is    SubSpace of T
 
 the carrier of X1 is    set 
 
 the topology of X1 is    Element of K10(K10( the carrier of X1))
 
K10( the carrier of X1) is    set 
 
K10(K10( the carrier of X1)) is    set 
 
 TopStruct(#  the carrier of X1, the topology of X1 #) is   strict   TopStruct 
 
 [#] X1 is   non  proper   Element of K10( the carrier of X1)
 
 [#] TopStruct(#  the carrier of X1, the topology of X1 #) is   non  proper   Element of K10( the carrier of TopStruct(#  the carrier of X1, the topology of X1 #))
 
 the carrier of TopStruct(#  the carrier of X1, the topology of X1 #) is    set 
 
K10( the carrier of TopStruct(#  the carrier of X1, the topology of X1 #)) is    set 
 
 [#] T is   non  proper   Element of K10( the carrier of T)
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
 the topology of TopStruct(#  the carrier of X1, the topology of X1 #) is    Element of K10(K10( the carrier of TopStruct(#  the carrier of X1, the topology of X1 #)))
 
K10(K10( the carrier of TopStruct(#  the carrier of X1, the topology of X1 #))) is    set 
 
 the topology of T is    Element of K10(K10( the carrier of T))
 
K10(K10( the carrier of T)) is    set 
 
Y1 is    Element of K10( the carrier of TopStruct(#  the carrier of X1, the topology of X1 #))
 
Y2 is    Element of K10( the carrier of T)
 
Y2 /\ ([#] TopStruct(#  the carrier of X1, the topology of X1 #)) is    Element of K10( the carrier of TopStruct(#  the carrier of X1, the topology of X1 #))
 
T is    TopStruct 
 
X1 is    SubSpace of T
 
 the carrier of X1 is    set 
 
X2 is    SubSpace of T
 
 the carrier of X2 is    set 
 
 the topology of X1 is    Element of K10(K10( the carrier of X1))
 
K10( the carrier of X1) is    set 
 
K10(K10( the carrier of X1)) is    set 
 
 TopStruct(#  the carrier of X1, the topology of X1 #) is   strict   TopStruct 
 
 the topology of X2 is    Element of K10(K10( the carrier of X2))
 
K10( the carrier of X2) is    set 
 
K10(K10( the carrier of X2)) is    set 
 
 TopStruct(#  the carrier of X2, the topology of X2 #) is   strict   TopStruct 
 
Y1 is   strict   SubSpace of T
 
 [#] Y1 is   non  proper   Element of K10( the carrier of Y1)
 
 the carrier of Y1 is    set 
 
K10( the carrier of Y1) is    set 
 
Y2 is   strict   SubSpace of T
 
 [#] Y2 is   non  proper   Element of K10( the carrier of Y2)
 
 the carrier of Y2 is    set 
 
K10( the carrier of Y2) is    set 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
A1 is    Element of K10( the carrier of T)
 
T | A1 is   strict   SubSpace of T
 
T is   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like   SubSpace of T
 
X2 is   TopSpace-like   SubSpace of T
 
 the carrier of X1 is    set 
 
 the topology of X1 is   non  empty   Element of K10(K10( the carrier of X1))
 
K10( the carrier of X1) is    set 
 
K10(K10( the carrier of X1)) is    set 
 
 TopStruct(#  the carrier of X1, the topology of X1 #) is   strict   TopSpace-like   TopStruct 
 
 the carrier of X2 is    set 
 
 the topology of X2 is   non  empty   Element of K10(K10( the carrier of X2))
 
K10( the carrier of X2) is    set 
 
K10(K10( the carrier of X2)) is    set 
 
 TopStruct(#  the carrier of X2, the topology of X2 #) is   strict   TopSpace-like   TopStruct 
 
T is   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like   SubSpace of T
 
X2 is   TopSpace-like   SubSpace of X1
 
 [#] X2 is   non  proper   open   closed   Element of K10( the carrier of X2)
 
 the carrier of X2 is    set 
 
K10( the carrier of X2) is    set 
 
 [#] X1 is   non  proper   open   closed   Element of K10( the carrier of X1)
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
 [#] T is   non  proper   open   closed   Element of K10( the carrier of T)
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
 the topology of X2 is   non  empty   Element of K10(K10( the carrier of X2))
 
K10(K10( the carrier of X2)) is    set 
 
 the topology of T is   non  empty   Element of K10(K10( the carrier of T))
 
K10(K10( the carrier of T)) is    set 
 
Y1 is    Element of K10( the carrier of X2)
 
 the topology of X1 is   non  empty   Element of K10(K10( the carrier of X1))
 
K10(K10( the carrier of X1)) is    set 
 
C2 is    Element of K10( the carrier of X1)
 
C2 /\ ([#] X2) is    Element of K10( the carrier of X2)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ ([#] X1) is    Element of K10( the carrier of X1)
 
C1 /\ ([#] X2) is    Element of K10( the carrier of X2)
 
([#] X1) /\ ([#] X2) is    Element of K10( the carrier of X2)
 
C1 /\ (([#] X1) /\ ([#] X2)) is    Element of K10( the carrier of X2)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ ([#] X2) is    Element of K10( the carrier of X2)
 
C2 /\ ([#] X1) is    Element of K10( the carrier of X1)
 
A1 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of X1)
 
C1 /\ ([#] X2) is    Element of K10( the carrier of X2)
 
([#] X1) /\ ([#] X2) is    Element of K10( the carrier of X2)
 
C2 /\ (([#] X1) /\ ([#] X2)) is    Element of K10( the carrier of X2)
 
Y2 is    Element of K10( the carrier of X2)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is   TopSpace-like   SubSpace of T
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of X1)
 
 [#] X1 is   non  proper   open   closed   Element of K10( the carrier of X1)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ ([#] X1) is    Element of K10( the carrier of X1)
 
C2 /\ X2 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is   TopSpace-like   SubSpace of T
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of X1)
 
 [#] X1 is   non  proper   open   closed   Element of K10( the carrier of X1)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ ([#] X1) is    Element of K10( the carrier of X1)
 
C2 /\ X2 is    Element of K10( the carrier of T)
 
T is   non  empty   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is   non  empty   Element of K10( the carrier of T)
 
T | X1 is   non  empty   strict   SubSpace of T
 
X2 is   non  empty   strict   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
 [#] X2 is   non  empty   non  proper   Element of K10( the carrier of X2)
 
K10( the carrier of X2) is    set 
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is   TopSpace-like   SubSpace of T
 
 the carrier of X1 is    set 
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is   TopSpace-like   closed   SubSpace of T
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of X1)
 
Y2 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like   closed   SubSpace of T
 
X2 is   TopSpace-like   closed   SubSpace of X1
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
 [#] X1 is   non  proper   open   closed   Element of K10( the carrier of X1)
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
Y2 is    Element of K10( the carrier of T)
 
 the carrier of X2 is    set 
 
C2 is    Element of K10( the carrier of X1)
 
Y1 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ ([#] X1) is    Element of K10( the carrier of X1)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
 the carrier of X1 is   non  empty   set 
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
K10( the carrier of X2) is    set 
 
Y2 is    Element of K10( the carrier of X2)
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
C2 is    Element of K10( the carrier of T)
 
 [#] X2 is   non  empty   non  proper   open   closed   Element of K10( the carrier of X2)
 
C2 /\ ([#] X2) is    Element of K10( the carrier of X2)
 
Y1 is    Element of K10( the carrier of X2)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is   non  empty   Element of K10( the carrier of T)
 
X2 is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
Y1 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of Y1 is   non  empty   set 
 
T is    TopStruct 
 
T is    TopStruct 
 
 the carrier of T is    set 
 
 the topology of T is    Element of K10(K10( the carrier of T))
 
K10( the carrier of T) is    set 
 
K10(K10( the carrier of T)) is    set 
 
 TopStruct(#  the carrier of T, the topology of T #) is   strict   TopStruct 
 
 [#] TopStruct(#  the carrier of T, the topology of T #) is   non  proper   Element of K10( the carrier of TopStruct(#  the carrier of T, the topology of T #))
 
 the carrier of TopStruct(#  the carrier of T, the topology of T #) is    set 
 
K10( the carrier of TopStruct(#  the carrier of T, the topology of T #)) is    set 
 
 [#] T is   non  proper   Element of K10( the carrier of T)
 
 the topology of TopStruct(#  the carrier of T, the topology of T #) is    Element of K10(K10( the carrier of TopStruct(#  the carrier of T, the topology of T #)))
 
K10(K10( the carrier of TopStruct(#  the carrier of T, the topology of T #))) is    set 
 
X2 is    Element of K10( the carrier of TopStruct(#  the carrier of T, the topology of T #))
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y2 /\ ([#] TopStruct(#  the carrier of T, the topology of T #)) is    Element of K10( the carrier of TopStruct(#  the carrier of T, the topology of T #))
 
Y1 is    Element of K10( the carrier of T)
 
Y1 /\ ([#] TopStruct(#  the carrier of T, the topology of T #)) is    Element of K10( the carrier of TopStruct(#  the carrier of T, the topology of T #))
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
 the topology of T is   non  empty   Element of K10(K10( the carrier of T))
 
K10( the carrier of T) is    set 
 
K10(K10( the carrier of T)) is    set 
 
 TopStruct(#  the carrier of T, the topology of T #) is   strict   TopSpace-like   TopStruct 
 
X1 is   strict   TopSpace-like   SubSpace of T
 
X2 is    Element of K10( the carrier of T)
 
 the carrier of X1 is    set 
 
 [#] T is   non  proper   open   closed   Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
T | ([#] T) is   non  empty   strict   TopSpace-like   SubSpace of T
 
X1 is    Element of K10( the carrier of T)
 
 the carrier of (T | ([#] T)) is   non  empty   set 
 
 [#] (T | ([#] T)) is   non  empty   non  proper   open   closed   Element of K10( the carrier of (T | ([#] T)))
 
K10( the carrier of (T | ([#] T))) is    set 
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is   TopSpace-like   SubSpace of T
 
 the carrier of X1 is    set 
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is   TopSpace-like  (T)  SubSpace of T
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of X1)
 
Y2 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like  (T)  SubSpace of T
 
X2 is   TopSpace-like  (X1)  SubSpace of X1
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
 [#] X1 is   non  proper   open   closed   Element of K10( the carrier of X1)
 
 the carrier of X1 is    set 
 
K10( the carrier of X1) is    set 
 
Y2 is    Element of K10( the carrier of T)
 
 the carrier of X2 is    set 
 
C2 is    Element of K10( the carrier of X1)
 
Y1 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ ([#] X1) is    Element of K10( the carrier of X1)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like  (T)  SubSpace of T
 
 the carrier of X1 is    set 
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
K10( the carrier of X2) is    set 
 
Y2 is    Element of K10( the carrier of X2)
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
C2 is    Element of K10( the carrier of T)
 
 [#] X2 is   non  empty   non  proper   open   closed   Element of K10( the carrier of X2)
 
C2 /\ ([#] X2) is    Element of K10( the carrier of X2)
 
Y1 is    Element of K10( the carrier of X2)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is   non  empty   Element of K10( the carrier of T)
 
X2 is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
Y1 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of Y1 is   non  empty   set 
 
T is   non  empty   TopStruct 
 
X1 is   non  empty   SubSpace of T
 
 the carrier of X1 is   non  empty   set 
 
X2 is   non  empty   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 \/  the carrier of X2 is   non  empty   set 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 \/ Y2 is    Element of K10( the carrier of T)
 
C1 is   non  empty   Element of K10( the carrier of T)
 
T | C1 is   non  empty   strict   SubSpace of T
 
 the carrier of (T | C1) is   non  empty   set 
 
 [#] (T | C1) is   non  empty   non  proper   Element of K10( the carrier of (T | C1))
 
K10( the carrier of (T | C1)) is    set 
 
Y1 is   non  empty   strict   SubSpace of T
 
 the carrier of Y1 is   non  empty   set 
 
Y2 is   non  empty   strict   SubSpace of T
 
 the carrier of Y2 is   non  empty   set 
 
Y1 is   non  empty   strict   SubSpace of T
 
 the carrier of Y1 is   non  empty   set 
 
Y2 is   non  empty   SubSpace of T
 
 the carrier of Y2 is   non  empty   set 
 
C2 is   non  empty   SubSpace of T
 
 the carrier of C2 is   non  empty   set 
 
 the carrier of Y2 \/  the carrier of C2 is   non  empty   set 
 
 the carrier of C2 \/  the carrier of Y2 is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
(T,(T,X1,X2),Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X2,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,(T,X2,Y1)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,(T,X1,X2),Y1) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of Y1 is   non  empty   set 
 
 the carrier of (T,X1,X2) \/  the carrier of Y1 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 \/  the carrier of X2 is   non  empty   set 
 
( the carrier of X1 \/  the carrier of X2) \/  the carrier of Y1 is   non  empty   set 
 
 the carrier of X2 \/  the carrier of Y1 is   non  empty   set 
 
 the carrier of X1 \/ ( the carrier of X2 \/  the carrier of Y1) is   non  empty   set 
 
 the carrier of (T,X2,Y1) is   non  empty   set 
 
 the carrier of X1 \/  the carrier of (T,X2,Y1) is   non  empty   set 
 
 the carrier of (T,X1,(T,X2,Y1)) is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of X1 \/  the carrier of X2 is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
 the topology of X2 is   non  empty   Element of K10(K10( the carrier of X2))
 
K10( the carrier of X2) is    set 
 
K10(K10( the carrier of X2)) is    set 
 
 TopStruct(#  the carrier of X2, the topology of X2 #) is   non  empty   strict   TopSpace-like   TopStruct 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X1 \/  the carrier of X2 is   non  empty   set 
 
 the carrier of TopStruct(#  the carrier of X2, the topology of X2 #) is   non  empty   set 
 
 the carrier of X1 \/  the carrier of X2 is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
X2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
X2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
X2 is    1-sorted 
 
 the carrier of X2 is    set 
 
Y1 is    1-sorted 
 
 the carrier of Y1 is    set 
 
T is   non  empty   TopStruct 
 
X1 is   non  empty   SubSpace of T
 
X2 is   non  empty   SubSpace of T
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 /\ Y2 is    Element of K10( the carrier of T)
 
C1 is   non  empty   Element of K10( the carrier of T)
 
T | C1 is   non  empty   strict   SubSpace of T
 
 the carrier of (T | C1) is   non  empty   set 
 
 [#] (T | C1) is   non  empty   non  proper   Element of K10( the carrier of (T | C1))
 
K10( the carrier of (T | C1)) is    set 
 
Y1 is   non  empty   strict   SubSpace of T
 
 the carrier of Y1 is   non  empty   set 
 
Y2 is   non  empty   strict   SubSpace of T
 
 the carrier of Y2 is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X2,X1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X2,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,(T,X1,X2),Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,(T,X2,Y1)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 /\  the carrier of X1 is    set 
 
 the carrier of (T,X2,X1) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of Y1 is   non  empty   set 
 
 the carrier of (T,X1,X2) /\  the carrier of Y1 is    set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
( the carrier of X1 /\  the carrier of X2) /\  the carrier of Y1 is    set 
 
 the carrier of X2 /\  the carrier of Y1 is    set 
 
 the carrier of X1 /\ ( the carrier of X2 /\  the carrier of Y1) is    set 
 
 the carrier of (T,X2,Y1) is   non  empty   set 
 
 the carrier of X1 /\  the carrier of (T,X2,Y1) is    set 
 
 the carrier of (T,(T,X1,X2),Y1) is   non  empty   set 
 
 the carrier of (T,X1,(T,X2,Y1)) is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X1 is   non  empty   set 
 
 the topology of X1 is   non  empty   Element of K10(K10( the carrier of X1))
 
K10( the carrier of X1) is    set 
 
K10(K10( the carrier of X1)) is    set 
 
 TopStruct(#  the carrier of X1, the topology of X1 #) is   non  empty   strict   TopSpace-like   TopStruct 
 
 the carrier of X2 is   non  empty   set 
 
 the topology of X2 is   non  empty   Element of K10(K10( the carrier of X2))
 
K10( the carrier of X2) is    set 
 
K10(K10( the carrier of X2)) is    set 
 
 TopStruct(#  the carrier of X2, the topology of X2 #) is   non  empty   strict   TopSpace-like   TopStruct 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
 the carrier of TopStruct(#  the carrier of X1, the topology of X1 #) is   non  empty   set 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
 the carrier of TopStruct(#  the carrier of X2, the topology of X2 #) is   non  empty   set 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
X2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
X2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
(T,(T,X1,X2),Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X2,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,(T,X1,Y1),(T,X2,Y1)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y1,X1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,(T,Y1,X1),(T,Y1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of Y1 is   non  empty   set 
 
 the carrier of X1 /\  the carrier of Y1 is    set 
 
 the carrier of (T,X1,X2) /\  the carrier of Y1 is    set 
 
 the carrier of (T,(T,X1,X2),Y1) is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 \/  the carrier of X2 is   non  empty   set 
 
( the carrier of X1 \/  the carrier of X2) /\  the carrier of Y1 is    set 
 
 the carrier of X2 /\  the carrier of Y1 is    set 
 
( the carrier of X1 /\  the carrier of Y1) \/ ( the carrier of X2 /\  the carrier of Y1) is    set 
 
 the carrier of (T,X1,Y1) is   non  empty   set 
 
 the carrier of (T,X1,Y1) \/ ( the carrier of X2 /\  the carrier of Y1) is   non  empty   set 
 
 the carrier of (T,X2,Y1) is   non  empty   set 
 
 the carrier of (T,X1,Y1) \/  the carrier of (T,X2,Y1) is   non  empty   set 
 
 the carrier of (T,(T,X1,Y1),(T,X2,Y1)) is   non  empty   set 
 
(T,(T,Y1,X1),(T,X2,Y1)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
(T,(T,X1,X2),Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X2,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,(T,X1,Y1),(T,X2,Y1)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y1,X1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,(T,Y1,X1),(T,Y1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of Y1 is   non  empty   set 
 
 the carrier of (T,X2,Y1) is   non  empty   set 
 
 the carrier of (T,X1,Y1) is   non  empty   set 
 
 the carrier of (T,X1,Y1) /\  the carrier of (T,X2,Y1) is    set 
 
 the carrier of (T,(T,X1,X2),Y1) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of (T,X1,X2) \/  the carrier of Y1 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 /\  the carrier of X2 is    set 
 
( the carrier of X1 /\  the carrier of X2) \/  the carrier of Y1 is   non  empty   set 
 
 the carrier of X1 \/  the carrier of Y1 is   non  empty   set 
 
 the carrier of X2 \/  the carrier of Y1 is   non  empty   set 
 
( the carrier of X1 \/  the carrier of Y1) /\ ( the carrier of X2 \/  the carrier of Y1) is    set 
 
 the carrier of (T,X1,Y1) /\ ( the carrier of X2 \/  the carrier of Y1) is    set 
 
 the carrier of (T,(T,X1,Y1),(T,X2,Y1)) is   non  empty   set 
 
T is    TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
 Cl X1 is   closed   Element of K10( the carrier of T)
 
 Cl X2 is   closed   Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
 Cl X1 is   closed   Element of K10( the carrier of T)
 
(Cl X1) \ X2 is    Element of K10( the carrier of T)
 
 Cl X2 is   closed   Element of K10( the carrier of T)
 
(Cl X2) \ X1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
 Cl X2 is   closed   Element of K10( the carrier of T)
 
X1 `  is    Element of K10( the carrier of T)
 
 the carrier of T \ X1 is    set 
 
(X1 `) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (X1 `) is    set 
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
 Cl X2 is   closed   Element of K10( the carrier of T)
 
 Cl X1 is   closed   Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
 Cl X1 is   closed   Element of K10( the carrier of T)
 
(Cl X1) `  is   open   Element of K10( the carrier of T)
 
 the carrier of T \ (Cl X1) is    set 
 
 Cl X2 is   closed   Element of K10( the carrier of T)
 
(Cl X2) `  is   open   Element of K10( the carrier of T)
 
 the carrier of T \ (Cl X2) is    set 
 
(X1 \/ X2) /\ ((Cl X2) `) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (Cl X2) is    Element of K10( the carrier of T)
 
X1 \ (Cl X2) is    Element of K10( the carrier of T)
 
X2 \ (Cl X2) is    Element of K10( the carrier of T)
 
(X1 \ (Cl X2)) \/ (X2 \ (Cl X2)) is    Element of K10( the carrier of T)
 
(X1 \ (Cl X2)) \/ {} is    set 
 
X1 /\ ((Cl X2) `) is    Element of K10( the carrier of T)
 
(X1 \/ X2) /\ ((Cl X1) `) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (Cl X1) is    Element of K10( the carrier of T)
 
X1 \ (Cl X1) is    Element of K10( the carrier of T)
 
X2 \ (Cl X1) is    Element of K10( the carrier of T)
 
(X1 \ (Cl X1)) \/ (X2 \ (Cl X1)) is    Element of K10( the carrier of T)
 
{} \/ (X2 \ (Cl X1)) is    set 
 
X2 /\ ((Cl X1) `) is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
X1 /\ Y1 is    Element of K10( the carrier of T)
 
X2 /\ Y1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
 Cl X1 is   closed   Element of K10( the carrier of T)
 
 Cl X2 is   closed   Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
 Cl X1 is   closed   Element of K10( the carrier of T)
 
 Cl X2 is   closed   Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 /\ Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 /\ Y2 is    Element of K10( the carrier of T)
 
X1 /\ Y2 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ X1 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y1 /\ X2 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ X2 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y2 `  is    Element of K10( the carrier of T)
 
 the carrier of T \ Y2 is    set 
 
Y1 `  is    Element of K10( the carrier of T)
 
 the carrier of T \ Y1 is    set 
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y2 `  is    Element of K10( the carrier of T)
 
 the carrier of T \ Y2 is    set 
 
Y1 `  is    Element of K10( the carrier of T)
 
 the carrier of T \ Y1 is    set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 /\ Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 /\ Y2 is    Element of K10( the carrier of T)
 
X1 /\ Y2 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ X1 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y1 /\ X2 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ X2 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 \ Y2 is    Element of K10( the carrier of T)
 
Y2 \ Y1 is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
 Cl (X1 \ X2) is   closed   Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
(Cl (X1 \ X2)) /\ (X2 \ X1) is    Element of K10( the carrier of T)
 
 Cl (X2 \ X1) is   closed   Element of K10( the carrier of T)
 
(X1 \ X2) /\ (Cl (X2 \ X1)) is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
 Cl (X2 \ X1) is   closed   Element of K10( the carrier of T)
 
(Cl (X2 \ X1)) \ X2 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
 Cl (X1 \ X2) is   closed   Element of K10( the carrier of T)
 
(Cl (X1 \ X2)) \ X1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
 Cl (X2 \ X1) is   closed   Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
 Cl (X1 \ X2) is   closed   Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
X1 \/ Y1 is    Element of K10( the carrier of T)
 
X2 \/ Y1 is    Element of K10( the carrier of T)
 
(X1 \/ Y1) \ (X2 \/ Y1) is    Element of K10( the carrier of T)
 
X1 \ (X2 \/ Y1) is    Element of K10( the carrier of T)
 
Y1 \ (X2 \/ Y1) is    Element of K10( the carrier of T)
 
(X1 \ (X2 \/ Y1)) \/ (Y1 \ (X2 \/ Y1)) is    Element of K10( the carrier of T)
 
(X1 \ (X2 \/ Y1)) \/ {} is    set 
 
X1 \ X2 is    Element of K10( the carrier of T)
 
X1 \ Y1 is    Element of K10( the carrier of T)
 
(X1 \ X2) /\ (X1 \ Y1) is    Element of K10( the carrier of T)
 
(X2 \/ Y1) \ (X1 \/ Y1) is    Element of K10( the carrier of T)
 
X2 \ (X1 \/ Y1) is    Element of K10( the carrier of T)
 
Y1 \ (X1 \/ Y1) is    Element of K10( the carrier of T)
 
(X2 \ (X1 \/ Y1)) \/ (Y1 \ (X1 \/ Y1)) is    Element of K10( the carrier of T)
 
(X2 \ (X1 \/ Y1)) \/ {} is    set 
 
X2 \ X1 is    Element of K10( the carrier of T)
 
X2 \ Y1 is    Element of K10( the carrier of T)
 
(X2 \ X1) /\ (X2 \ Y1) is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
X2 \/ Y1 is    Element of K10( the carrier of T)
 
X1 \/ Y2 is    Element of K10( the carrier of T)
 
Y1 \ (X1 \/ Y2) is    Element of K10( the carrier of T)
 
Y2 \ (X2 \/ Y1) is    Element of K10( the carrier of T)
 
(X1 \/ Y2) \ (X2 \/ Y1) is    Element of K10( the carrier of T)
 
X1 \ (X2 \/ Y1) is    Element of K10( the carrier of T)
 
(X1 \ (X2 \/ Y1)) \/ (Y2 \ (X2 \/ Y1)) is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
(X2 \/ Y1) \ (X1 \/ Y2) is    Element of K10( the carrier of T)
 
X2 \ (X1 \/ Y2) is    Element of K10( the carrier of T)
 
(X2 \ (X1 \/ Y2)) \/ (Y1 \ (X1 \/ Y2)) is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
X2 \ Y1 is    Element of K10( the carrier of T)
 
Y1 \ X2 is    Element of K10( the carrier of T)
 
X1 \ Y1 is    Element of K10( the carrier of T)
 
(X1 \ Y1) /\ (X2 \ Y1) is    Element of K10( the carrier of T)
 
Y1 \ X1 is    Element of K10( the carrier of T)
 
(Y1 \ X1) \/ (Y1 \ X2) is    Element of K10( the carrier of T)
 
(X1 /\ X2) \ Y1 is    Element of K10( the carrier of T)
 
Y1 \ (X1 /\ X2) is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
X2 \ Y1 is    Element of K10( the carrier of T)
 
Y1 \ X2 is    Element of K10( the carrier of T)
 
Y1 \ X1 is    Element of K10( the carrier of T)
 
(Y1 \ X1) /\ (Y1 \ X2) is    Element of K10( the carrier of T)
 
X1 \ Y1 is    Element of K10( the carrier of T)
 
(X1 \ Y1) \/ (X2 \ Y1) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ Y1 is    Element of K10( the carrier of T)
 
Y1 \ (X1 \/ X2) is    Element of K10( the carrier of T)
 
T is   TopSpace-like   TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
(X1 \/ X2) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (X1 \/ X2) is    set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C2 /\ (X2 \ X1) is    Element of K10( the carrier of T)
 
C2 /\ X2 is    Element of K10( the carrier of T)
 
C2 /\ X1 is    Element of K10( the carrier of T)
 
(C2 /\ X2) \ (C2 /\ X1) is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 \/ C1 is    Element of K10( the carrier of T)
 
(C2 \/ C1) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (C2 \/ C1) is    set 
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is    Element of K10( the carrier of T)
 
(X1 \ X2) \/ (X2 \ X1) is    Element of K10( the carrier of T)
 
((X1 \ X2) \/ (X2 \ X1)) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ ((X1 \ X2) \/ (X2 \ X1)) is    set 
 
X1 \+\ X2 is    Element of K10( the carrier of T)
 
(X1 \+\ X2) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (X1 \+\ X2) is    set 
 
(X1 \/ X2) \ (X1 /\ X2) is    Element of K10( the carrier of T)
 
((X1 \/ X2) \ (X1 /\ X2)) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ ((X1 \/ X2) \ (X1 /\ X2)) is    set 
 
((X1 \/ X2) `) \/ (X1 /\ X2) is    Element of K10( the carrier of T)
 
(((X1 \/ X2) `) \/ (X1 /\ X2)) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
((X1 \/ X2) `) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 /\ X2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(((X1 \/ X2) `) /\ (X1 \/ X2)) \/ ((X1 /\ X2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
 {} T is   empty   open   closed   Element of K10( the carrier of T)
 
({} T) \/ ((X1 /\ X2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
C1 /\ (X1 \ X2) is    Element of K10( the carrier of T)
 
C1 /\ X1 is    Element of K10( the carrier of T)
 
C1 /\ X2 is    Element of K10( the carrier of T)
 
(C1 /\ X1) \ (C1 /\ X2) is    Element of K10( the carrier of T)
 
(C1 /\ X1) \/ (C1 /\ X2) is    Element of K10( the carrier of T)
 
(C2 /\ X1) \/ (C2 /\ X2) is    Element of K10( the carrier of T)
 
 [#] T is   non  proper   open   closed   Element of K10( the carrier of T)
 
A1 `  is    Element of K10( the carrier of T)
 
 the carrier of T \ A1 is    set 
 
A1 \/ (A1 `) is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 \/ C1 is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is    Element of K10( the carrier of T)
 
(X1 \ X2) \/ (X2 \ X1) is    Element of K10( the carrier of T)
 
(C2 /\ (X1 \/ X2)) /\ (C1 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) /\ C1 is    Element of K10( the carrier of T)
 
C2 /\ ((X1 \/ X2) /\ C1) is    Element of K10( the carrier of T)
 
(C2 /\ ((X1 \/ X2) /\ C1)) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 /\ C1 is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
((C2 /\ C1) /\ (X1 \/ X2)) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ ((X1 \/ X2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
((C2 /\ C1) /\ (X1 \/ X2)) \ (X1 /\ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (X1 /\ X2) is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ ((X1 \/ X2) \ (X1 /\ X2)) is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ ((X1 \ X2) \/ (X2 \ X1)) is    Element of K10( the carrier of T)
 
(C1 /\ (X1 \/ X2)) \/ (A1 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
C1 \/ A1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((C1 \/ A1) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (C1 \/ A1) is    Element of K10( the carrier of T)
 
(A1 /\ (X1 \/ X2)) \/ (C2 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
A1 \/ C2 is    Element of K10( the carrier of T)
 
(A1 \/ C2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((A1 \/ C2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (A1 \/ C2) is    Element of K10( the carrier of T)
 
 [#] T is   non  proper   open   closed   Element of K10( the carrier of T)
 
(C1 \/ A1) \/ C2 is    Element of K10( the carrier of T)
 
(A1 \/ C2) \/ C1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
A2 /\ c10 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 \/ C1 is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is    Element of K10( the carrier of T)
 
(A1 /\ (X1 \/ X2)) \/ (C2 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
A1 \/ C2 is    Element of K10( the carrier of T)
 
(A1 \/ C2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((A1 \/ C2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (A1 \/ C2) is    Element of K10( the carrier of T)
 
(C1 /\ (X1 \/ X2)) \/ (A1 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
C1 \/ A1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((C1 \/ A1) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (C1 \/ A1) is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
(A1 \/ C2) \/ C1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) \/ C2 is    Element of K10( the carrier of T)
 
c10 is   non  empty   Element of K10( the carrier of T)
 
c10 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A2 is   non  empty   Element of K10( the carrier of T)
 
A2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
c10 \/ A2 is   non  empty   Element of K10( the carrier of T)
 
Y is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ Y is   non  empty   Element of K10( the carrier of T)
 
Y /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ Y is   non  empty   Element of K10( the carrier of T)
 
Y /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y1 \/ Y2 is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 \/ Y2 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is    Element of K10( the carrier of T)
 
Y1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 \/ A1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) \/ A2 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
Y1 is   non  empty   Element of K10( the carrier of T)
 
Y2 is   non  empty   Element of K10( the carrier of T)
 
Y1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y1 \/ Y2 is   non  empty   Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is   non  empty   Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is   non  empty   Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is   non  empty   Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
(X1 \/ X2) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (X1 \/ X2) is    set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C2 /\ (X2 \ X1) is    Element of K10( the carrier of T)
 
C2 /\ X2 is    Element of K10( the carrier of T)
 
C2 /\ X1 is    Element of K10( the carrier of T)
 
(C2 /\ X2) \ (C2 /\ X1) is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 \/ C1 is    Element of K10( the carrier of T)
 
(C2 \/ C1) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (C2 \/ C1) is    set 
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is    Element of K10( the carrier of T)
 
(X1 \ X2) \/ (X2 \ X1) is    Element of K10( the carrier of T)
 
((X1 \ X2) \/ (X2 \ X1)) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ ((X1 \ X2) \/ (X2 \ X1)) is    set 
 
X1 \+\ X2 is    Element of K10( the carrier of T)
 
(X1 \+\ X2) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (X1 \+\ X2) is    set 
 
(X1 \/ X2) \ (X1 /\ X2) is    Element of K10( the carrier of T)
 
((X1 \/ X2) \ (X1 /\ X2)) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ ((X1 \/ X2) \ (X1 /\ X2)) is    set 
 
((X1 \/ X2) `) \/ (X1 /\ X2) is    Element of K10( the carrier of T)
 
(((X1 \/ X2) `) \/ (X1 /\ X2)) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
((X1 \/ X2) `) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 /\ X2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(((X1 \/ X2) `) /\ (X1 \/ X2)) \/ ((X1 /\ X2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
 {} T is   empty   open   closed   Element of K10( the carrier of T)
 
({} T) \/ ((X1 /\ X2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
C1 /\ (X1 \ X2) is    Element of K10( the carrier of T)
 
C1 /\ X1 is    Element of K10( the carrier of T)
 
C1 /\ X2 is    Element of K10( the carrier of T)
 
(C1 /\ X1) \ (C1 /\ X2) is    Element of K10( the carrier of T)
 
(C1 /\ X1) \/ (C1 /\ X2) is    Element of K10( the carrier of T)
 
(C2 /\ X1) \/ (C2 /\ X2) is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
A1 `  is    Element of K10( the carrier of T)
 
 the carrier of T \ A1 is    set 
 
(A1 `) \/ A1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 \/ C1 is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is    Element of K10( the carrier of T)
 
(X1 \ X2) \/ (X2 \ X1) is    Element of K10( the carrier of T)
 
(C2 /\ (X1 \/ X2)) /\ (C1 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) /\ C1 is    Element of K10( the carrier of T)
 
C2 /\ ((X1 \/ X2) /\ C1) is    Element of K10( the carrier of T)
 
(C2 /\ ((X1 \/ X2) /\ C1)) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 /\ C1 is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
((C2 /\ C1) /\ (X1 \/ X2)) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ ((X1 \/ X2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
((C2 /\ C1) /\ (X1 \/ X2)) \ (X1 /\ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (X1 /\ X2) is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ ((X1 \/ X2) \ (X1 /\ X2)) is    Element of K10( the carrier of T)
 
(C2 /\ C1) /\ ((X1 \ X2) \/ (X2 \ X1)) is    Element of K10( the carrier of T)
 
(C1 /\ (X1 \/ X2)) \/ (A1 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
C1 \/ A1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((C1 \/ A1) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (C1 \/ A1) is    Element of K10( the carrier of T)
 
(A1 /\ (X1 \/ X2)) \/ (C2 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
A1 \/ C2 is    Element of K10( the carrier of T)
 
(A1 \/ C2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((A1 \/ C2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (A1 \/ C2) is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
(C1 \/ A1) \/ C2 is    Element of K10( the carrier of T)
 
(A1 \/ C2) \/ C1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
A2 /\ c10 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
X1 \ X2 is    Element of K10( the carrier of T)
 
X2 \ X1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 \/ C1 is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is    Element of K10( the carrier of T)
 
(A1 /\ (X1 \/ X2)) \/ (C2 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
A1 \/ C2 is    Element of K10( the carrier of T)
 
(A1 \/ C2) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((A1 \/ C2) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (A1 \/ C2) is    Element of K10( the carrier of T)
 
(C1 /\ (X1 \/ X2)) \/ (A1 /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
C1 \/ A1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ ((C1 \/ A1) /\ (X1 \/ X2)) is    Element of K10( the carrier of T)
 
(X1 \/ X2) \ (C1 \/ A1) is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
(A1 \/ C2) \/ C1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) \/ C2 is    Element of K10( the carrier of T)
 
c10 is   non  empty   Element of K10( the carrier of T)
 
c10 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A2 is   non  empty   Element of K10( the carrier of T)
 
A2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
c10 \/ A2 is   non  empty   Element of K10( the carrier of T)
 
Y is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ Y is   non  empty   Element of K10( the carrier of T)
 
Y /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ Y is   non  empty   Element of K10( the carrier of T)
 
Y /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y1 \/ Y2 is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 \/ Y2 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is    Element of K10( the carrier of T)
 
Y1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
C1 \/ A1 is    Element of K10( the carrier of T)
 
(C1 \/ A1) \/ A2 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
X1 /\ X2 is    Element of K10( the carrier of T)
 
Y1 is   non  empty   Element of K10( the carrier of T)
 
Y2 is   non  empty   Element of K10( the carrier of T)
 
Y1 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
Y1 \/ Y2 is   non  empty   Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is   non  empty   Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C2 /\ (X1 \/ X2) is    Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is   non  empty   Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
(Y1 \/ Y2) \/ C2 is   non  empty   Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
X1 is    Element of K10( the carrier of T)
 
X2 is    Element of K10( the carrier of T)
 
X1 \/ X2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 /\ Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 /\ Y2 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ X1 is    Element of K10( the carrier of T)
 
(Y1 /\ Y2) /\ X2 is    Element of K10( the carrier of T)
 
Y1 /\ X2 is    Element of K10( the carrier of T)
 
X2 \ Y1 is    Element of K10( the carrier of T)
 
Y2 \ Y1 is    Element of K10( the carrier of T)
 
X2 \ (Y1 /\ X2) is    Element of K10( the carrier of T)
 
X1 /\ Y2 is    Element of K10( the carrier of T)
 
X1 \ Y2 is    Element of K10( the carrier of T)
 
Y1 \ Y2 is    Element of K10( the carrier of T)
 
X1 \ (X1 /\ Y2) is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
Y1 is    SubSpace of T
 
 the carrier of Y1 is    set 
 
Y2 is    SubSpace of T
 
 the carrier of Y2 is    set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
X2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
X2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X2,X1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y1,X1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of Y1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
C2 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
 the carrier of (T,X2,X1) is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
 the carrier of (T,Y1,X1) is   non  empty   set 
 
C1 is    Element of K10( the carrier of T)
 
C2 /\ C1 is    Element of K10( the carrier of T)
 
Y2 /\ C1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
C2 is   TopSpace-like   SubSpace of T
 
C1 is   TopSpace-like   SubSpace of T
 
A1 is    Element of K10( the carrier of T)
 
 the carrier of C2 is    set 
 
A2 is    Element of K10( the carrier of T)
 
 the carrier of C1 is    set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
C2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of C2 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
A1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C2 /\ C1 is    Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
(T,A1,A2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A1,A2) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 \/ A2 is    Element of K10( the carrier of T)
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y /\ c10 is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of (T,C2,C1) is   non  empty   set 
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
c10 /\ Y is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
A1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C2 /\ C1 is    Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
(T,A1,A2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A1,A2) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 \/ A2 is    Element of K10( the carrier of T)
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y /\ c10 is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of (T,C2,C1) is   non  empty   set 
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
c10 /\ Y is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
Y1 is    SubSpace of T
 
 the carrier of Y1 is    set 
 
Y2 is    SubSpace of T
 
 the carrier of Y2 is    set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
Y1 is    Element of K10( the carrier of T)
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
 the carrier of X2 is   non  empty   set 
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like   closed   SubSpace of T
 
X2 is   TopSpace-like   closed   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
 the carrier of X1 is    set 
 
 the carrier of X2 is    set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   TopSpace-like  (T)  SubSpace of T
 
X2 is   TopSpace-like  (T)  SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
Y1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
 the carrier of X1 is    set 
 
 the carrier of X2 is    set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
C2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,C2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X2,C2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of C2 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,C2) is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
 the carrier of (T,X2,C2) is   non  empty   set 
 
C1 is    Element of K10( the carrier of T)
 
Y2 \/ C1 is    Element of K10( the carrier of T)
 
Y1 \/ C1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
C2 is   non  empty   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X2,C2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C1,X1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
 the carrier of (T,X2,C2) is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,C1) is   non  empty   set 
 
Y2 \/ A2 is    Element of K10( the carrier of T)
 
Y1 \/ A1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X2,Y1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of Y1 is   non  empty   set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
C2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
Y2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
 the carrier of (T,X2,Y1) is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
C2 /\ Y2 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
C2 is   non  empty   TopSpace-like   SubSpace of T
 
 the carrier of C2 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
 the topology of T is   non  empty   Element of K10(K10( the carrier of T))
 
K10( the carrier of T) is    set 
 
K10(K10( the carrier of T)) is    set 
 
 TopStruct(#  the carrier of T, the topology of T #) is   non  empty   strict   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,C1) is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
(A2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
{} \/ (A1 /\ (Y2 \/ Y1)) is    set 
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
((A2 \/ A1) \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 \/ Y is    Element of K10( the carrier of T)
 
A2 \/ (A1 \/ Y) is    Element of K10( the carrier of T)
 
(A2 \/ (A1 \/ Y)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A1 \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ ((A1 \/ Y) /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
{} \/ ((A1 \/ Y) /\ (Y2 \/ Y1)) is    set 
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A1 /\ (Y2 \/ Y1)) \/ (Y /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
 the carrier of (T,c10,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
Y1 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,(T,X1,X2)) is   non  empty   set 
 
A2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ {} is    set 
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
A1 \/ A2 is    Element of K10( the carrier of T)
 
(A1 \/ A2) \/ Y is    Element of K10( the carrier of T)
 
((A1 \/ A2) \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A2 \/ Y is    Element of K10( the carrier of T)
 
A1 \/ (A2 \/ Y) is    Element of K10( the carrier of T)
 
(A1 \/ (A2 \/ Y)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A1 /\ (Y2 \/ Y1)) \/ ((A2 \/ Y) /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
{} \/ ((A2 \/ Y) /\ (Y2 \/ Y1)) is    set 
 
Y /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ (Y /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
 the carrier of (T,c10,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
Y2 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
(A2 \/ A1) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (A2 \/ A1) is    set 
 
c10 is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ c10 is    Element of K10( the carrier of T)
 
c10 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,C1) \/ Y is   non  empty   set 
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
((A2 \/ A1) \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
((A2 \/ A1) /\ (Y2 \/ Y1)) \/ (Y /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
((A2 \/ A1) /\ (Y2 \/ Y1)) \/ {} is    set 
 
 the carrier of (T,c10,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
c12 is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ c12 is    Element of K10( the carrier of T)
 
c12 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C1 is   non  empty   Element of K10( the carrier of T)
 
C2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C2 \/ C1 is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 /\ (Y2 \/ Y1)) \/ {} is    set 
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
C1 \/ C2 is   non  empty   Element of K10( the carrier of T)
 
(C1 \/ C2) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
((C1 \/ C2) \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C2 \/ A1 is   non  empty   Element of K10( the carrier of T)
 
C1 \/ (C2 \/ A1) is   non  empty   Element of K10( the carrier of T)
 
(C1 \/ (C2 \/ A1)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
{} \/ ((C2 \/ A1) /\ (Y2 \/ Y1)) is    set 
 
(C2 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
Y2 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
{} \/ (C1 /\ (Y2 \/ Y1)) is    set 
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
((C2 \/ C1) \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C1 \/ A1 is   non  empty   Element of K10( the carrier of T)
 
C2 \/ (C1 \/ A1) is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ (C1 \/ A1)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C1 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
{} \/ ((C1 \/ A1) /\ (Y2 \/ Y1)) is    set 
 
(C1 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
Y1 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A1,(T,X1,X2)) is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
(T,A2,A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A2,A1) is   non  empty   set 
 
c10 is   non  empty   Element of K10( the carrier of T)
 
c10 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
c10 is   non  empty   Element of K10( the carrier of T)
 
c10 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
Y is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of Y is   non  empty   set 
 
((C2 \/ C1) \/ c10) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
((C2 \/ C1) /\ (Y2 \/ Y1)) \/ {} is    set 
 
(T,Y,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,Y,(T,X1,X2)) is   non  empty   set 
 
(T,(T,A2,A1),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of (T,A2,A1) \/ c10 is   non  empty   set 
 
 the carrier of (T,(T,A2,A1),Y) is   non  empty   set 
 
(T,A2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A2,(T,X1,X2)) is   non  empty   set 
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,A2,A1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,A2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A2,c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,A2,c10),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
 {} T is   empty   open   closed   Element of K10( the carrier of T)
 
(A2 \/ A1) \/ ({} T) is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,C1) is   non  empty   set 
 
 the carrier of (T,C2,C1) \/ Y is   non  empty   set 
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
c12 is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ c12 is    Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C1 is   non  empty   Element of K10( the carrier of T)
 
C2 \/ C1 is   non  empty   Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
(T,A2,A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
c10 is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of Y is   non  empty   set 
 
(T,(T,A2,A1),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A2,A1) is   non  empty   set 
 
 the carrier of (T,A2,A1) \/ c10 is   non  empty   set 
 
 the carrier of (T,(T,A2,A1),Y) is   non  empty   set 
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,A2,A1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
C1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A2 is   non  empty   TopSpace-like   closed   SubSpace of T
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,A2,c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,(T,A2,c10),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
 the carrier of T is   non  empty   set 
 
 the topology of T is   non  empty   Element of K10(K10( the carrier of T))
 
K10( the carrier of T) is    set 
 
K10(K10( the carrier of T)) is    set 
 
 TopStruct(#  the carrier of T, the topology of T #) is   non  empty   strict   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,C1) is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
(A2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
{} \/ (A1 /\ (Y2 \/ Y1)) is    set 
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
((A2 \/ A1) \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 \/ Y is    Element of K10( the carrier of T)
 
A2 \/ (A1 \/ Y) is    Element of K10( the carrier of T)
 
(A2 \/ (A1 \/ Y)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A1 \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ ((A1 \/ Y) /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
{} \/ ((A1 \/ Y) /\ (Y2 \/ Y1)) is    set 
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A1 /\ (Y2 \/ Y1)) \/ (Y /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
 the carrier of (T,c10,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
Y1 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,(T,X1,X2)) is   non  empty   set 
 
A2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ {} is    set 
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
A1 \/ A2 is    Element of K10( the carrier of T)
 
(A1 \/ A2) \/ Y is    Element of K10( the carrier of T)
 
((A1 \/ A2) \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A2 \/ Y is    Element of K10( the carrier of T)
 
A1 \/ (A2 \/ Y) is    Element of K10( the carrier of T)
 
(A1 \/ (A2 \/ Y)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A1 /\ (Y2 \/ Y1)) \/ ((A2 \/ Y) /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
{} \/ ((A2 \/ Y) /\ (Y2 \/ Y1)) is    set 
 
Y /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 /\ (Y2 \/ Y1)) \/ (Y /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
 the carrier of (T,c10,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
Y2 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
 the carrier of (T,C1,(T,X1,X2)) is   non  empty   set 
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
(A2 \/ A1) `  is    Element of K10( the carrier of T)
 
 the carrier of T \ (A2 \/ A1) is    set 
 
c10 is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ c10 is    Element of K10( the carrier of T)
 
c10 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,C1) \/ Y is   non  empty   set 
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
((A2 \/ A1) \/ Y) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(A2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
Y /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
((A2 \/ A1) /\ (Y2 \/ Y1)) \/ (Y /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
((A2 \/ A1) /\ (Y2 \/ Y1)) \/ {} is    set 
 
 the carrier of (T,c10,(T,X1,X2)) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
c12 is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ c12 is    Element of K10( the carrier of T)
 
c12 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C1 is   non  empty   Element of K10( the carrier of T)
 
C2 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C2 \/ C1 is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 /\ (Y2 \/ Y1)) \/ {} is    set 
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
C1 \/ C2 is   non  empty   Element of K10( the carrier of T)
 
(C1 \/ C2) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
((C1 \/ C2) \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C2 \/ A1 is   non  empty   Element of K10( the carrier of T)
 
C1 \/ (C2 \/ A1) is   non  empty   Element of K10( the carrier of T)
 
(C1 \/ (C2 \/ A1)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
{} \/ ((C2 \/ A1) /\ (Y2 \/ Y1)) is    set 
 
(C2 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
Y2 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
{} \/ (C1 /\ (Y2 \/ Y1)) is    set 
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
A1 is   non  empty   Element of K10( the carrier of T)
 
A1 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ A1 is   non  empty   Element of K10( the carrier of T)
 
((C2 \/ C1) \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
C1 \/ A1 is   non  empty   Element of K10( the carrier of T)
 
C2 \/ (C1 \/ A1) is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ (C1 \/ A1)) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C1 \/ A1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
{} \/ ((C1 \/ A1) /\ (Y2 \/ Y1)) is    set 
 
(C1 /\ (Y2 \/ Y1)) \/ (A1 /\ (Y2 \/ Y1)) is    Element of K10( the carrier of T)
 
Y1 \/ (Y2 /\ Y1) is    Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A1,(T,X1,X2)) is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
(T,A2,A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A2,A1) is   non  empty   set 
 
c10 is   non  empty   Element of K10( the carrier of T)
 
c10 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
c10 is   non  empty   Element of K10( the carrier of T)
 
c10 /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
Y is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of Y is   non  empty   set 
 
((C2 \/ C1) \/ c10) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
(C2 \/ C1) /\ (Y2 \/ Y1) is    Element of K10( the carrier of T)
 
((C2 \/ C1) /\ (Y2 \/ Y1)) \/ {} is    set 
 
(T,Y,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,Y,(T,X1,X2)) is   non  empty   set 
 
(T,(T,A2,A1),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
 the carrier of (T,A2,A1) \/ c10 is   non  empty   set 
 
 the carrier of (T,(T,A2,A1),Y) is   non  empty   set 
 
(T,A2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A2,(T,X1,X2)) is   non  empty   set 
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,A2,A1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A1,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,A2,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,c10,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,A2,c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,A2,c10),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,Y,(T,X1,X2)) is   non  empty   strict   TopSpace-like   SubSpace of T
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of C1 is   non  empty   set 
 
 the carrier of C2 is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
 {} T is   empty   open   closed   Element of K10( the carrier of T)
 
(A2 \/ A1) \/ ({} T) is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of c10 is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y is    Element of K10( the carrier of T)
 
 the carrier of (T,C2,C1) is   non  empty   set 
 
 the carrier of (T,C2,C1) \/ Y is   non  empty   set 
 
(A2 \/ A1) \/ Y is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
A2 is    Element of K10( the carrier of T)
 
A1 is    Element of K10( the carrier of T)
 
A2 \/ A1 is    Element of K10( the carrier of T)
 
Y2 /\ Y1 is    Element of K10( the carrier of T)
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
c12 is    Element of K10( the carrier of T)
 
(A2 \/ A1) \/ c12 is    Element of K10( the carrier of T)
 
C2 is   non  empty   Element of K10( the carrier of T)
 
C1 is   non  empty   Element of K10( the carrier of T)
 
C2 \/ C1 is   non  empty   Element of K10( the carrier of T)
 
A1 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A1 is   non  empty   set 
 
A2 is   non  empty   strict   TopSpace-like  (T)  SubSpace of T
 
 the carrier of A2 is   non  empty   set 
 
(T,A2,A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
c10 is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
c10 is   non  empty   Element of K10( the carrier of T)
 
(C2 \/ C1) \/ c10 is   non  empty   Element of K10( the carrier of T)
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
Y is   non  empty   strict   TopSpace-like   closed   SubSpace of T
 
 the carrier of Y is   non  empty   set 
 
(T,(T,A2,A1),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of (T,A2,A1) is   non  empty   set 
 
 the carrier of (T,A2,A1) \/ c10 is   non  empty   set 
 
 the carrier of (T,(T,A2,A1),Y) is   non  empty   set 
 
c10 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,A2,A1),c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
C2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
C1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,C2,C1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A1 is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,C2,C1),A1) is   non  empty   strict   TopSpace-like   SubSpace of T
 
A2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
c10 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,A2,c10) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y is   non  empty   TopSpace-like   closed   SubSpace of T
 
(T,(T,A2,c10),Y) is   non  empty   strict   TopSpace-like   SubSpace of T
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of X2 is   non  empty   set 
 
 the carrier of X1 is   non  empty   set 
 
Y2 is    Element of K10( the carrier of T)
 
Y1 is    Element of K10( the carrier of T)
 
Y2 \/ Y1 is    Element of K10( the carrier of T)
 
 [#] T is   non  empty   non  proper   open   closed   Element of K10( the carrier of T)
 
T is   non  empty   TopSpace-like   TopStruct 
 
X1 is   non  empty   TopSpace-like   SubSpace of T
 
X2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,X1,X2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
Y2 is   non  empty   TopSpace-like  (T)  SubSpace of T
 
(T,Y1,Y2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
Y1 is   non  empty   TopSpace-like   SubSpace of T
 
Y2 is   non  empty   TopSpace-like   SubSpace of T
 
(T,Y1,Y2) is   non  empty   strict   TopSpace-like   SubSpace of T
 
 the carrier of T is   non  empty   set 
 
K10( the carrier of T) is    set 
 
 the carrier of Y2 is   non  empty   set 
 
 the carrier of Y1 is   non  empty   set 
 
A1 is    Element of K10( the carrier of T)
 
 the carrier of X1 is   non  empty   set 
 
A2 is    Element of K10( the carrier of T)
 
 the carrier of X2 is   non  empty   set 
 
C1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
A1 \/ A2 is    Element of K10( the carrier of T)
 
C1 is    Element of K10( the carrier of T)
 
C2 is    Element of K10( the carrier of T)
 
C1 /\ C2 is    Element of K10( the carrier of T)
 
 the carrier of (T,Y1,Y2) is   non  empty   set 
 
 the carrier of (T,X1,X2) is   non  empty   set 
 
c10 is    Element of K10( the carrier of T)
 
Y is    Element of K10( the carrier of T)
 
c10 /\ Y is    Element of K10( the carrier of T)
 
T is    TopStruct 
 
 [#] T is   non  proper   Element of K10( the carrier of T)
 
 the carrier of T is    set 
 
K10( the carrier of T) is    set 
 
T | ([#] T) is   strict   SubSpace of T
 
 the topology of T is    Element of K10(K10( the carrier of T))
 
K10(K10( the carrier of T)) is    set 
 
 TopStruct(#  the carrier of T, the topology of T #) is   strict   TopStruct 
 
 [#] TopStruct(#  the carrier of T, the topology of T #) is   non  proper   Element of K10( the carrier of TopStruct(#  the carrier of T, the topology of T #))
 
 the carrier of TopStruct(#  the carrier of T, the topology of T #) is    set 
 
K10( the carrier of TopStruct(#  the carrier of T, the topology of T #)) is    set