:: TOPREAL2 semantic presentation

begin

theorem :: TOPREAL2:1
for p1, p2 being ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) st p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) <> p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in R^2-unit_square : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) & p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in R^2-unit_square : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) holds
ex P1, P2 being ( ( non empty ) ( functional non empty ) Subset of ) st
( P1 : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & P2 : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & R^2-unit_square : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) = P1 : ( ( non empty ) ( functional non empty ) Subset of ) \/ P2 : ( ( non empty ) ( functional non empty ) Subset of ) : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) & P1 : ( ( non empty ) ( functional non empty ) Subset of ) /\ P2 : ( ( non empty ) ( functional non empty ) Subset of ) : ( ( ) ( functional ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) = {p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) } : ( ( ) ( functional non empty ) set ) ) ;

theorem :: TOPREAL2:2
R^2-unit_square : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) is compact ;

theorem :: TOPREAL2:3
for q1, q2 being ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) )
for Q, P being ( ( non empty ) ( functional non empty ) Subset of )
for f being ( ( Function-like quasi_total ) ( Relation-like the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b3 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -defined the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b4 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -valued Function-like non empty total quasi_total ) Function of ( ( ) ( non empty ) set ) , ( ( ) ( non empty ) set ) ) st f : ( ( Function-like quasi_total ) ( Relation-like the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b3 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -defined the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b4 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -valued Function-like non empty total quasi_total ) Function of ( ( ) ( non empty ) set ) , ( ( ) ( non empty ) set ) ) is being_homeomorphism & Q : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of q1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,q2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) holds
for p1, p2 being ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) st p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) = f : ( ( Function-like quasi_total ) ( Relation-like the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b3 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -defined the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b4 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -valued Function-like non empty total quasi_total ) Function of ( ( ) ( non empty ) set ) , ( ( ) ( non empty ) set ) ) . q1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) & p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) = f : ( ( Function-like quasi_total ) ( Relation-like the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b3 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -defined the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | b4 : ( ( non empty ) ( functional non empty ) Subset of ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -valued Function-like non empty total quasi_total ) Function of ( ( ) ( non empty ) set ) , ( ( ) ( non empty ) set ) ) . q2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) holds
P : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ;

definition
let P be ( ( ) ( functional ) Subset of ) ;
attr P is being_simple_closed_curve means :: TOPREAL2:def 1
ex f being ( ( Function-like quasi_total ) ( Relation-like the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | R^2-unit_square : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -defined the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | P : ( ( ) ( ) RLTopStruct ) ) : ( ( strict ) ( strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( ) set ) -valued Function-like quasi_total ) Function of ( ( ) ( non empty ) set ) , ( ( ) ( ) set ) ) st f : ( ( Function-like quasi_total ) ( Relation-like the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | R^2-unit_square : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( non empty ) set ) -defined the carrier of ((TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) | P : ( ( ) ( functional ) Subset of ) ) : ( ( strict ) ( strict TopSpace-like ) SubSpace of TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) ) : ( ( ) ( ) set ) -valued Function-like quasi_total ) Function of ( ( ) ( non empty ) set ) , ( ( ) ( ) set ) ) is being_homeomorphism ;
end;

registration
cluster R^2-unit_square : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) -> being_simple_closed_curve ;
end;

registration
cluster functional non empty being_simple_closed_curve for ( ( ) ( ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) ;
end;

definition
mode Simple_closed_curve is ( ( being_simple_closed_curve ) ( functional being_simple_closed_curve ) Subset of ) ;
end;

theorem :: TOPREAL2:4
for P being ( ( non empty ) ( functional non empty ) Subset of ) st P : ( ( non empty ) ( functional non empty ) Subset of ) is being_simple_closed_curve holds
ex p1, p2 being ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) st
( p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) <> p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) & p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) ) ;

theorem :: TOPREAL2:5
for P being ( ( non empty ) ( functional non empty ) Subset of ) holds
( P : ( ( non empty ) ( functional non empty ) Subset of ) is being_simple_closed_curve iff ( ex p1, p2 being ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) st
( p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) <> p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) & p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) ) & ( for p1, p2 being ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) st p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) <> p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) & p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) holds
ex P1, P2 being ( ( non empty ) ( functional non empty ) Subset of ) st
( P1 : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & P2 : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & P : ( ( non empty ) ( functional non empty ) Subset of ) = P1 : ( ( non empty ) ( functional non empty ) Subset of ) \/ P2 : ( ( non empty ) ( functional non empty ) Subset of ) : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) & P1 : ( ( non empty ) ( functional non empty ) Subset of ) /\ P2 : ( ( non empty ) ( functional non empty ) Subset of ) : ( ( ) ( functional ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) = {p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) } : ( ( ) ( functional non empty ) set ) ) ) ) ) ;

theorem :: TOPREAL2:6
for P being ( ( non empty ) ( functional non empty ) Subset of ) holds
( P : ( ( non empty ) ( functional non empty ) Subset of ) is being_simple_closed_curve iff ex p1, p2 being ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ex P1, P2 being ( ( non empty ) ( functional non empty ) Subset of ) st
( p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) <> p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) & p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) in P : ( ( non empty ) ( functional non empty ) Subset of ) & P1 : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & P2 : ( ( non empty ) ( functional non empty ) Subset of ) is_an_arc_of p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) & P : ( ( non empty ) ( functional non empty ) Subset of ) = P1 : ( ( non empty ) ( functional non empty ) Subset of ) \/ P2 : ( ( non empty ) ( functional non empty ) Subset of ) : ( ( ) ( functional non empty ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) & P1 : ( ( non empty ) ( functional non empty ) Subset of ) /\ P2 : ( ( non empty ) ( functional non empty ) Subset of ) : ( ( ) ( functional ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) = {p1 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) ,p2 : ( ( ) ( Relation-like Function-like V42(2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) FinSequence-like V154() ) Point of ( ( ) ( functional non empty ) set ) ) } : ( ( ) ( functional non empty ) set ) ) ) ;

registration
cluster being_simple_closed_curve -> non empty compact for ( ( ) ( ) Element of K19( the carrier of (TOP-REAL 2 : ( ( ) ( non empty V27() V28() ext-real positive non negative V110() V114() V115() V162() V163() V164() V165() V166() V167() ) Element of NAT : ( ( ) ( V162() V163() V164() V165() V166() V167() V168() ) Element of K19(REAL : ( ( ) ( V162() V163() V164() V168() ) set ) ) : ( ( ) ( ) set ) ) ) ) : ( ( strict ) ( non empty TopSpace-like T_0 T_1 T_2 V128() V174() V175() V176() V177() V178() V179() V180() strict ) RLTopStruct ) : ( ( ) ( functional non empty ) set ) ) : ( ( ) ( ) set ) ) ;
end;