:: Manysorted Sets
:: by Andrzej Trybulec
::
:: Received July 7, 1993
:: Copyright (c) 1993-2015 Association of Mizar Users


theorem :: PBOOLE:1
for f being Function st f is non-empty holds
rng f is with_non-empty_elements ;

theorem :: PBOOLE:2
for f being Function holds
( f is empty-yielding iff ( f = {} or rng f = {{}} ) )
proof end;

registration
let I be set ;
cluster Relation-like I -defined Function-like total for set ;
existence
ex b1 being I -defined Function st b1 is total
proof end;
end;

definition
let I be set ;
mode ManySortedSet of I is I -defined total Function;
end;

scheme :: PBOOLE:sch 1
KuratowskiFunction{ F1() -> set , F2( object ) -> set } :
ex f being ManySortedSet of F1() st
for e being object st e in F1() holds
f . e in F2(e)
provided
A1: for e being object st e in F1() holds
F2(e) <> {}
proof end;

definition
let I be set ;
let X, Y be ManySortedSet of I;
pred X in Y means :: PBOOLE:def 1
 for i being object st i in I holds
X . i in Y . i;
pred X c= Y means :: PBOOLE:def 2
 for i being object st i in I holds
X . i c= Y . i;
reflexivity
for X being ManySortedSet of I
for i being object st i in I holds
X . i c= X . i ;
end;

:: deftheorem defines in PBOOLE:def 1 :
for I being set
for X, Y being ManySortedSet of I holds
( X in Y iff for i being object st i in I holds
X . i in Y . i );

:: deftheorem defines c= PBOOLE:def 2 :
for I being set
for X, Y being ManySortedSet of I holds
( X c= Y iff for i being object st i in I holds
X . i c= Y . i );

definition
let I be non empty set ;
let X, Y be ManySortedSet of I;
:: original: in
redefine pred X in Y;
asymmetry
for X, Y being ManySortedSet of I st (I,b1,b2) holds
not (I,b2,b1)
proof end;
end;

scheme :: PBOOLE:sch 2
PSeparation{ F1() -> set , F2() -> ManySortedSet of F1(), P1[ object , object ] } :
ex X being ManySortedSet of F1() st
for i being object st i in F1() holds
for e being object holds
( e in X . i iff ( e in F2() . i & P1[i,e] ) )
proof end;

theorem Th3: :: PBOOLE:3
for I being set
for X, Y being ManySortedSet of I st ( for i being object st i in I holds
X . i = Y . i ) holds
X = Y
proof end;

definition
let I be set ;
func EmptyMS I -> ManySortedSet of I equals :: PBOOLE:def 3
I --> {};
coherence
I --> {} is ManySortedSet of I ;
correctness
;
let X, Y be ManySortedSet of I;
func X (\/) Y -> ManySortedSet of I means :Def4: :: PBOOLE:def 4
 for i being object st i in I holds
it . i = (X . i) \/ (Y . i);
existence
ex b1 being ManySortedSet of I st
for i being object st i in I holds
b1 . i = (X . i) \/ (Y . i)
proof end;
uniqueness
for b1, b2 being ManySortedSet of I st ( for i being object st i in I holds
b1 . i = (X . i) \/ (Y . i) ) & ( for i being object st i in I holds
b2 . i = (X . i) \/ (Y . i) ) holds
b1 = b2
proof end;
commutativity
for b1, X, Y being ManySortedSet of I st ( for i being object st i in I holds
b1 . i = (X . i) \/ (Y . i) ) holds
for i being object st i in I holds
b1 . i = (Y . i) \/ (X . i) ;
idempotence
for X being ManySortedSet of I
for i being object st i in I holds
X . i = (X . i) \/ (X . i) ;
func X (/\) Y -> ManySortedSet of I means :Def5: :: PBOOLE:def 5
 for i being object st i in I holds
it . i = (X . i) /\ (Y . i);
existence
ex b1 being ManySortedSet of I st
for i being object st i in I holds
b1 . i = (X . i) /\ (Y . i)
proof end;
uniqueness
for b1, b2 being ManySortedSet of I st ( for i being object st i in I holds
b1 . i = (X . i) /\ (Y . i) ) & ( for i being object st i in I holds
b2 . i = (X . i) /\ (Y . i) ) holds
b1 = b2
proof end;
commutativity
for b1, X, Y being ManySortedSet of I st ( for i being object st i in I holds
b1 . i = (X . i) /\ (Y . i) ) holds
for i being object st i in I holds
b1 . i = (Y . i) /\ (X . i) ;
idempotence
for X being ManySortedSet of I
for i being object st i in I holds
X . i = (X . i) /\ (X . i) ;
func X (\) Y -> ManySortedSet of I means :Def6: :: PBOOLE:def 6
 for i being object st i in I holds
it . i = (X . i) \ (Y . i);
existence
ex b1 being ManySortedSet of I st
for i being object st i in I holds
b1 . i = (X . i) \ (Y . i)
proof end;
uniqueness
for b1, b2 being ManySortedSet of I st ( for i being object st i in I holds
b1 . i = (X . i) \ (Y . i) ) & ( for i being object st i in I holds
b2 . i = (X . i) \ (Y . i) ) holds
b1 = b2
proof end;
pred X overlaps Y means :: PBOOLE:def 7
 for i being object st i in I holds
X . i meets Y . i;
symmetry
for X, Y being ManySortedSet of I st ( for i being object st i in I holds
X . i meets Y . i ) holds
for i being object st i in I holds
Y . i meets X . i ;
pred X misses Y means :: PBOOLE:def 8
 for i being object st i in I holds
X . i misses Y . i;
symmetry
for X, Y being ManySortedSet of I st ( for i being object st i in I holds
X . i misses Y . i ) holds
for i being object st i in I holds
Y . i misses X . i ;
end;

:: deftheorem defines EmptyMS PBOOLE:def 3 :
for I being set holds EmptyMS I = I --> {};

:: deftheorem Def4 defines (\/) PBOOLE:def 4 :
for I being set
for X, Y, b4 being ManySortedSet of I holds
( b4 = X (\/) Y iff for i being object st i in I holds
b4 . i = (X . i) \/ (Y . i) );

:: deftheorem Def5 defines (/\) PBOOLE:def 5 :
for I being set
for X, Y, b4 being ManySortedSet of I holds
( b4 = X (/\) Y iff for i being object st i in I holds
b4 . i = (X . i) /\ (Y . i) );

:: deftheorem Def6 defines (\) PBOOLE:def 6 :
for I being set
for X, Y, b4 being ManySortedSet of I holds
( b4 = X (\) Y iff for i being object st i in I holds
b4 . i = (X . i) \ (Y . i) );

:: deftheorem defines overlaps PBOOLE:def 7 :
for I being set
for X, Y being ManySortedSet of I holds
( X overlaps Y iff for i being object st i in I holds
X . i meets Y . i );

:: deftheorem defines misses PBOOLE:def 8 :
for I being set
for X, Y being ManySortedSet of I holds
( X misses Y iff for i being object st i in I holds
X . i misses Y . i );

notation
let I be set ;
let X, Y be ManySortedSet of I;
antonym X meets Y for X misses Y;
end;

definition
let I be set ;
let X, Y be ManySortedSet of I;
func X (\+\) Y -> ManySortedSet of I equals :: PBOOLE:def 9
(X (\) Y) (\/) (Y (\) X);
correctness
coherence
(X (\) Y) (\/) (Y (\) X) is ManySortedSet of I;
;
commutativity
for b1, X, Y being ManySortedSet of I st b1 = (X (\) Y) (\/) (Y (\) X) holds
b1 = (Y (\) X) (\/) (X (\) Y) ;
end;

:: deftheorem defines (\+\) PBOOLE:def 9 :
for I being set
for X, Y being ManySortedSet of I holds X (\+\) Y = (X (\) Y) (\/) (Y (\) X);

theorem Th4: :: PBOOLE:4
for I being set
for X, Y being ManySortedSet of I
for i being object st i in I holds
(X (\+\) Y) . i = (X . i) \+\ (Y . i)
proof end;

theorem Th5: :: PBOOLE:5
for I being set
for i being object holds (EmptyMS I) . i = {}
proof end;

theorem Th6: :: PBOOLE:6
for I being set
for X being ManySortedSet of I st ( for i being object st i in I holds
X . i = {} ) holds
X = EmptyMS I
proof end;

theorem Th7: :: PBOOLE:7
for I being set
for x, X, Y being ManySortedSet of I st ( x in X or x in Y ) holds
x in X (\/) Y
proof end;

theorem Th8: :: PBOOLE:8
for I being set
for x, X, Y being ManySortedSet of I holds
( x in X (/\) Y iff ( x in X & x in Y ) )
proof end;

theorem Th9: :: PBOOLE:9
for I being set
for x, X, Y being ManySortedSet of I st x in X & X c= Y holds
x in Y
proof end;

theorem Th10: :: PBOOLE:10
for I being set
for x, X, Y being ManySortedSet of I st x in X & x in Y holds
X overlaps Y
proof end;

theorem Th11: :: PBOOLE:11
for I being set
for X, Y being ManySortedSet of I st X overlaps Y holds
ex x being ManySortedSet of I st
( x in X & x in Y )
proof end;

theorem :: PBOOLE:12
for I being set
for x, X, Y being ManySortedSet of I st x in X (\) Y holds
x in X
proof end;

Lm1: for I being set
for X, Y being ManySortedSet of I st X c= Y & Y c= X holds
X = Y
proof end;

definition
let I be set ;
let X, Y be ManySortedSet of I;
:: original: =
redefine pred X = Y means :: PBOOLE:def 10
 for i being object st i in I holds
X . i = Y . i;
compatibility
( X = Y iff for i being object st i in I holds
X . i = Y . i ) by Th3;
end;

:: deftheorem defines = PBOOLE:def 10 :
for I being set
for X, Y being ManySortedSet of I holds
( X = Y iff for i being object st i in I holds
X . i = Y . i );

theorem Th13: :: PBOOLE:13
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y & Y c= Z holds
X c= Z
proof end;

theorem Th14: :: PBOOLE:14
for I being set
for X, Y being ManySortedSet of I holds X c= X (\/) Y
proof end;

theorem Th15: :: PBOOLE:15
for I being set
for X, Y being ManySortedSet of I holds X (/\) Y c= X
proof end;

theorem Th16: :: PBOOLE:16
for I being set
for X, Y, Z being ManySortedSet of I st X c= Z & Y c= Z holds
X (\/) Y c= Z
proof end;

theorem Th17: :: PBOOLE:17
for I being set
for X, Y, Z being ManySortedSet of I st Z c= X & Z c= Y holds
Z c= X (/\) Y
proof end;

theorem :: PBOOLE:18
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y holds
X (\/) Z c= Y (\/) Z
proof end;

theorem Th19: :: PBOOLE:19
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y holds
X (/\) Z c= Y (/\) Z
proof end;

theorem Th20: :: PBOOLE:20
for I being set
for X, Y, Z, V being ManySortedSet of I st X c= Y & Z c= V holds
X (\/) Z c= Y (\/) V
proof end;

theorem :: PBOOLE:21
for I being set
for X, Y, Z, V being ManySortedSet of I st X c= Y & Z c= V holds
X (/\) Z c= Y (/\) V
proof end;

theorem Th22: :: PBOOLE:22
for I being set
for X, Y being ManySortedSet of I st X c= Y holds
X (\/) Y = Y
proof end;

theorem Th23: :: PBOOLE:23
for I being set
for X, Y being ManySortedSet of I st X c= Y holds
X (/\) Y = X
proof end;

theorem :: PBOOLE:24
for I being set
for X, Y, Z being ManySortedSet of I holds X (/\) Y c= X (\/) Z
proof end;

theorem :: PBOOLE:25
for I being set
for X, Y, Z being ManySortedSet of I st X c= Z holds
X (\/) (Y (/\) Z) = (X (\/) Y) (/\) Z
proof end;

theorem :: PBOOLE:26
for I being set
for X, Y, Z being ManySortedSet of I holds
( X = Y (\/) Z iff ( Y c= X & Z c= X & ( for V being ManySortedSet of I st Y c= V & Z c= V holds
X c= V ) ) )
proof end;

theorem :: PBOOLE:27
for I being set
for X, Y, Z being ManySortedSet of I holds
( X = Y (/\) Z iff ( X c= Y & X c= Z & ( for V being ManySortedSet of I st V c= Y & V c= Z holds
V c= X ) ) )
proof end;

theorem Th28: :: PBOOLE:28
for I being set
for X, Y, Z being ManySortedSet of I holds (X (\/) Y) (\/) Z = X (\/) (Y (\/) Z)
proof end;

theorem Th29: :: PBOOLE:29
for I being set
for X, Y, Z being ManySortedSet of I holds (X (/\) Y) (/\) Z = X (/\) (Y (/\) Z)
proof end;

theorem Th30: :: PBOOLE:30
for I being set
for X, Y being ManySortedSet of I holds X (/\) (X (\/) Y) = X
proof end;

theorem Th31: :: PBOOLE:31
for I being set
for X, Y being ManySortedSet of I holds X (\/) (X (/\) Y) = X
proof end;

theorem Th32: :: PBOOLE:32
for I being set
for X, Y, Z being ManySortedSet of I holds X (/\) (Y (\/) Z) = (X (/\) Y) (\/) (X (/\) Z)
proof end;

theorem Th33: :: PBOOLE:33
for I being set
for X, Y, Z being ManySortedSet of I holds X (\/) (Y (/\) Z) = (X (\/) Y) (/\) (X (\/) Z)
proof end;

theorem :: PBOOLE:34
for I being set
for X, Y, Z being ManySortedSet of I st (X (/\) Y) (\/) (X (/\) Z) = X holds
X c= Y (\/) Z
proof end;

theorem :: PBOOLE:35
for I being set
for X, Y, Z being ManySortedSet of I st (X (\/) Y) (/\) (X (\/) Z) = X holds
Y (/\) Z c= X
proof end;

theorem :: PBOOLE:36
for I being set
for X, Y, Z being ManySortedSet of I holds ((X (/\) Y) (\/) (Y (/\) Z)) (\/) (Z (/\) X) = ((X (\/) Y) (/\) (Y (\/) Z)) (/\) (Z (\/) X)
proof end;

theorem :: PBOOLE:37
for I being set
for X, Y, Z being ManySortedSet of I st X (\/) Y c= Z holds
X c= Z
proof end;

theorem :: PBOOLE:38
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y (/\) Z holds
X c= Y
proof end;

theorem :: PBOOLE:39
for I being set
for X, Y, Z being ManySortedSet of I holds (X (\/) Y) (\/) Z = (X (\/) Z) (\/) (Y (\/) Z)
proof end;

theorem :: PBOOLE:40
for I being set
for X, Y, Z being ManySortedSet of I holds (X (/\) Y) (/\) Z = (X (/\) Z) (/\) (Y (/\) Z)
proof end;

theorem :: PBOOLE:41
for I being set
for X, Y being ManySortedSet of I holds X (\/) (X (\/) Y) = X (\/) Y
proof end;

theorem :: PBOOLE:42
for I being set
for X, Y being ManySortedSet of I holds X (/\) (X (/\) Y) = X (/\) Y
proof end;

theorem Th43: :: PBOOLE:43
for I being set
for X being ManySortedSet of I holds EmptyMS I c= X
proof end;

theorem Th44: :: PBOOLE:44
for I being set
for X being ManySortedSet of I st X c= EmptyMS I holds
X = EmptyMS I
proof end;

theorem :: PBOOLE:45
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y & X c= Z & Y (/\) Z = EmptyMS I holds
X = EmptyMS I by Th17, Th44;

theorem :: PBOOLE:46
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y & Y (/\) Z = EmptyMS I holds
X (/\) Z = EmptyMS I by Th44, Th19;

theorem :: PBOOLE:47
for I being set
for X being ManySortedSet of I holds
( X (\/) (EmptyMS I) = X & (EmptyMS I) (\/) X = X ) by Th22, Th43;

theorem :: PBOOLE:48
for I being set
for X, Y being ManySortedSet of I st X (\/) Y = EmptyMS I holds
X = EmptyMS I by Th44, Th14;

theorem :: PBOOLE:49
for I being set
for X being ManySortedSet of I holds X (/\) (EmptyMS I) = EmptyMS I by Th23, Th43;

theorem :: PBOOLE:50
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y (\/) Z & X (/\) Z = EmptyMS I holds
X c= Y
proof end;

theorem :: PBOOLE:51
for I being set
for X, Y being ManySortedSet of I st Y c= X & X (/\) Y = EmptyMS I holds
Y = EmptyMS I by Th23;

theorem Th52: :: PBOOLE:52
for I being set
for X, Y being ManySortedSet of I holds
( X (\) Y = EmptyMS I iff X c= Y )
proof end;

theorem Th53: :: PBOOLE:53
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y holds
X (\) Z c= Y (\) Z
proof end;

theorem Th54: :: PBOOLE:54
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y holds
Z (\) Y c= Z (\) X
proof end;

theorem :: PBOOLE:55
for I being set
for X, Y, Z, V being ManySortedSet of I st X c= Y & Z c= V holds
X (\) V c= Y (\) Z
proof end;

theorem Th56: :: PBOOLE:56
for I being set
for X, Y being ManySortedSet of I holds X (\) Y c= X
proof end;

theorem :: PBOOLE:57
for I being set
for X, Y being ManySortedSet of I st X c= Y (\) X holds
X = EmptyMS I
proof end;

theorem :: PBOOLE:58
for I being set
for X being ManySortedSet of I holds X (\) X = EmptyMS I by Th52;

theorem Th59: :: PBOOLE:59
for I being set
for X being ManySortedSet of I holds X (\) (EmptyMS I) = X
proof end;

theorem Th60: :: PBOOLE:60
for I being set
for X being ManySortedSet of I holds (EmptyMS I) (\) X = EmptyMS I by Th43, Th52;

theorem :: PBOOLE:61
for I being set
for X, Y being ManySortedSet of I holds X (\) (X (\/) Y) = EmptyMS I by Th14, Th52;

theorem Th62: :: PBOOLE:62
for I being set
for X, Y, Z being ManySortedSet of I holds X (/\) (Y (\) Z) = (X (/\) Y) (\) Z
proof end;

theorem Th63: :: PBOOLE:63
for I being set
for X, Y being ManySortedSet of I holds (X (\) Y) (/\) Y = EmptyMS I
proof end;

theorem Th64: :: PBOOLE:64
for I being set
for X, Y, Z being ManySortedSet of I holds X (\) (Y (\) Z) = (X (\) Y) (\/) (X (/\) Z)
proof end;

theorem Th65: :: PBOOLE:65
for I being set
for X, Y being ManySortedSet of I holds (X (\) Y) (\/) (X (/\) Y) = X
proof end;

theorem :: PBOOLE:66
for I being set
for X, Y being ManySortedSet of I st X c= Y holds
Y = X (\/) (Y (\) X)
proof end;

theorem Th67: :: PBOOLE:67
for I being set
for X, Y being ManySortedSet of I holds X (\/) (Y (\) X) = X (\/) Y
proof end;

theorem Th68: :: PBOOLE:68
for I being set
for X, Y being ManySortedSet of I holds X (\) (X (\) Y) = X (/\) Y
proof end;

theorem Th69: :: PBOOLE:69
for I being set
for X, Y, Z being ManySortedSet of I holds X (\) (Y (/\) Z) = (X (\) Y) (\/) (X (\) Z)
proof end;

theorem Th70: :: PBOOLE:70
for I being set
for X, Y being ManySortedSet of I holds X (\) (X (/\) Y) = X (\) Y
proof end;

theorem :: PBOOLE:71
for I being set
for X, Y being ManySortedSet of I holds
( X (/\) Y = EmptyMS I iff X (\) Y = X )
proof end;

theorem Th72: :: PBOOLE:72
for I being set
for X, Y, Z being ManySortedSet of I holds (X (\/) Y) (\) Z = (X (\) Z) (\/) (Y (\) Z)
proof end;

theorem Th73: :: PBOOLE:73
for I being set
for X, Y, Z being ManySortedSet of I holds (X (\) Y) (\) Z = X (\) (Y (\/) Z)
proof end;

theorem :: PBOOLE:74
for I being set
for X, Y, Z being ManySortedSet of I holds (X (/\) Y) (\) Z = (X (\) Z) (/\) (Y (\) Z)
proof end;

theorem Th75: :: PBOOLE:75
for I being set
for X, Y being ManySortedSet of I holds (X (\/) Y) (\) Y = X (\) Y
proof end;

theorem :: PBOOLE:76
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y (\/) Z holds
( X (\) Y c= Z & X (\) Z c= Y )
proof end;

theorem Th77: :: PBOOLE:77
for I being set
for X, Y being ManySortedSet of I holds (X (\/) Y) (\) (X (/\) Y) = (X (\) Y) (\/) (Y (\) X)
proof end;

theorem Th78: :: PBOOLE:78
for I being set
for X, Y being ManySortedSet of I holds (X (\) Y) (\) Y = X (\) Y
proof end;

theorem :: PBOOLE:79
for I being set
for X, Y, Z being ManySortedSet of I holds X (\) (Y (\/) Z) = (X (\) Y) (/\) (X (\) Z)
proof end;

theorem :: PBOOLE:80
for I being set
for X, Y being ManySortedSet of I st X (\) Y = Y (\) X holds
X = Y
proof end;

theorem :: PBOOLE:81
for I being set
for X, Y, Z being ManySortedSet of I holds X (/\) (Y (\) Z) = (X (/\) Y) (\) (X (/\) Z)
proof end;

theorem :: PBOOLE:82
for I being set
for X, Y, Z being ManySortedSet of I st X (\) Y c= Z holds
X c= Y (\/) Z
proof end;

theorem :: PBOOLE:83
for I being set
for X, Y being ManySortedSet of I holds X (\) Y c= X (\+\) Y by Th14;

theorem :: PBOOLE:84
for I being set
for X being ManySortedSet of I holds X (\+\) (EmptyMS I) = X
proof end;

theorem :: PBOOLE:85
for I being set
for X being ManySortedSet of I holds X (\+\) X = EmptyMS I by Th52;

theorem :: PBOOLE:86
for I being set
for X, Y being ManySortedSet of I holds X (\/) Y = (X (\+\) Y) (\/) (X (/\) Y)
proof end;

theorem Th87: :: PBOOLE:87
for I being set
for X, Y being ManySortedSet of I holds X (\+\) Y = (X (\/) Y) (\) (X (/\) Y)
proof end;

theorem :: PBOOLE:88
for I being set
for X, Y, Z being ManySortedSet of I holds (X (\+\) Y) (\) Z = (X (\) (Y (\/) Z)) (\/) (Y (\) (X (\/) Z))
proof end;

theorem :: PBOOLE:89
for I being set
for X, Y, Z being ManySortedSet of I holds X (\) (Y (\+\) Z) = (X (\) (Y (\/) Z)) (\/) ((X (/\) Y) (/\) Z)
proof end;

theorem Th90: :: PBOOLE:90
for I being set
for X, Y, Z being ManySortedSet of I holds (X (\+\) Y) (\+\) Z = X (\+\) (Y (\+\) Z)
proof end;

theorem :: PBOOLE:91
for I being set
for X, Y, Z being ManySortedSet of I st X (\) Y c= Z & Y (\) X c= Z holds
X (\+\) Y c= Z by Th16;

theorem Th92: :: PBOOLE:92
for I being set
for X, Y being ManySortedSet of I holds X (\/) Y = X (\+\) (Y (\) X)
proof end;

theorem Th93: :: PBOOLE:93
for I being set
for X, Y being ManySortedSet of I holds X (/\) Y = X (\+\) (X (\) Y)
proof end;

theorem Th94: :: PBOOLE:94
for I being set
for X, Y being ManySortedSet of I holds X (\) Y = X (\+\) (X (/\) Y)
proof end;

theorem Th95: :: PBOOLE:95
for I being set
for X, Y being ManySortedSet of I holds Y (\) X = X (\+\) (X (\/) Y)
proof end;

theorem :: PBOOLE:96
for I being set
for X, Y being ManySortedSet of I holds X (\/) Y = (X (\+\) Y) (\+\) (X (/\) Y)
proof end;

theorem :: PBOOLE:97
for I being set
for X, Y being ManySortedSet of I holds X (/\) Y = (X (\+\) Y) (\+\) (X (\/) Y)
proof end;

theorem :: PBOOLE:98
for I being set
for X, Y, Z being ManySortedSet of I st ( X overlaps Y or X overlaps Z ) holds
X overlaps Y (\/) Z
proof end;

theorem Th99: :: PBOOLE:99
for I being set
for X, Y, Z being ManySortedSet of I st X overlaps Y & Y c= Z holds
X overlaps Z
proof end;

theorem Th100: :: PBOOLE:100
for I being set
for X, Y, Z being ManySortedSet of I st X overlaps Y & X c= Z holds
Z overlaps Y
proof end;

theorem Th101: :: PBOOLE:101
for I being set
for X, Y, Z, V being ManySortedSet of I st X c= Y & Z c= V & X overlaps Z holds
Y overlaps V
proof end;

theorem :: PBOOLE:102
for I being set
for X, Y, Z being ManySortedSet of I st X overlaps Y (/\) Z holds
( X overlaps Y & X overlaps Z )
proof end;

theorem :: PBOOLE:103
for I being set
for X, Z, V being ManySortedSet of I st X overlaps Z & X c= V holds
X overlaps Z (/\) V
proof end;

theorem :: PBOOLE:104
for I being set
for X, Y, Z being ManySortedSet of I st X overlaps Y (\) Z holds
X overlaps Y by Th56, Th99;

theorem :: PBOOLE:105
for I being set
for X, Y, Z being ManySortedSet of I st not Y overlaps Z holds
not X (/\) Y overlaps X (/\) Z
proof end;

theorem :: PBOOLE:106
for I being set
for X, Y, Z being ManySortedSet of I st X overlaps Y (\) Z holds
Y overlaps X (\) Z
proof end;

theorem Th107: :: PBOOLE:107
for I being set
for X, Y, Z being ManySortedSet of I st X meets Y & Y c= Z holds
X meets Z
proof end;

theorem Th108: :: PBOOLE:108
for I being set
for X, Y being ManySortedSet of I holds Y misses X (\) Y
proof end;

theorem :: PBOOLE:109
for I being set
for X, Y being ManySortedSet of I holds X (/\) Y misses X (\) Y
proof end;

theorem :: PBOOLE:110
for I being set
for X, Y being ManySortedSet of I holds X (/\) Y misses X (\+\) Y
proof end;

theorem Th111: :: PBOOLE:111
for I being set
for X, Y being ManySortedSet of I st X misses Y holds
X (/\) Y = EmptyMS I
proof end;

theorem :: PBOOLE:112
for I being set
for X being ManySortedSet of I st X <> EmptyMS I holds
X meets X
proof end;

theorem :: PBOOLE:113
for I being set
for X, Y, Z being ManySortedSet of I st X c= Y & X c= Z & Y misses Z holds
X = EmptyMS I
proof end;

theorem :: PBOOLE:114
for I being set
for X, Y, Z, V being ManySortedSet of I st Z (\/) V = X (\/) Y & X misses Z & Y misses V holds
( X = V & Y = Z )
proof end;

theorem Th115: :: PBOOLE:115
for I being set
for X, Y being ManySortedSet of I st X misses Y holds
X (\) Y = X
proof end;

theorem :: PBOOLE:116
for I being set
for X, Y being ManySortedSet of I st X misses Y holds
(X (\/) Y) (\) Y = X
proof end;

theorem :: PBOOLE:117
for I being set
for X, Y being ManySortedSet of I st X (\) Y = X holds
X misses Y
proof end;

theorem :: PBOOLE:118
for I being set
for X, Y being ManySortedSet of I holds X (\) Y misses Y (\) X
proof end;

definition
let I be set ;
let X, Y be ManySortedSet of I;
pred X [= Y means :: PBOOLE:def 11
 for x being ManySortedSet of I st x in X holds
x in Y;
reflexivity
for X, x being ManySortedSet of I st x in X holds
x in X ;
end;

:: deftheorem defines [= PBOOLE:def 11 :
for I being set
for X, Y being ManySortedSet of I holds
( X [= Y iff for x being ManySortedSet of I st x in X holds
x in Y );

theorem :: PBOOLE:119
for I being set
for X, Y being ManySortedSet of I st X c= Y holds
X [= Y
proof end;

theorem :: PBOOLE:120
for I being set
for X, Y, Z being ManySortedSet of I st X [= Y & Y [= Z holds
X [= Z ;

theorem :: PBOOLE:121
EmptyMS {} in EmptyMS {} ;

theorem :: PBOOLE:122
for X being ManySortedSet of {} holds X = {} ;

theorem :: PBOOLE:123
for I being non empty set
for X, Y being ManySortedSet of I st X overlaps Y holds
X meets Y
proof end;

theorem Th124: :: PBOOLE:124
for I being non empty set
for x being ManySortedSet of I holds not x in EmptyMS I
proof end;

theorem :: PBOOLE:125
for I being non empty set
for x, X, Y being ManySortedSet of I st x in X & x in Y holds
X (/\) Y <> EmptyMS I by Th8, Th124;

theorem :: PBOOLE:126
for I being non empty set
for X being ManySortedSet of I holds not X overlaps EmptyMS I
proof end;

theorem Th127: :: PBOOLE:127
for I being non empty set
for X, Y being ManySortedSet of I st X (/\) Y = EmptyMS I holds
not X overlaps Y
proof end;

theorem :: PBOOLE:128
for I being non empty set
for X being ManySortedSet of I st X overlaps X holds
X <> EmptyMS I
proof end;

definition
let I be set ;
let X be ManySortedSet of I;
:: original: empty-yielding
redefine attr X is empty-yielding means :: PBOOLE:def 12
 for i being object st i in I holds
X . i is empty ;
compatibility
( X is empty-yielding iff for i being object st i in I holds
X . i is empty )
proof end;
:: original: non-empty
redefine attr X is non-empty means :Def13: :: PBOOLE:def 13
 for i being object st i in I holds
not X . i is empty ;
compatibility
( X is non-empty iff for i being object st i in I holds
not X . i is empty )
proof end;
end;

:: deftheorem defines empty-yielding PBOOLE:def 12 :
for I being set
for X being ManySortedSet of I holds
( X is empty-yielding iff for i being object st i in I holds
X . i is empty );

:: deftheorem Def13 defines non-empty PBOOLE:def 13 :
for I being set
for X being ManySortedSet of I holds
( X is non-empty iff for i being object st i in I holds
not X . i is empty );

registration
let I be set ;
cluster Relation-like V9() I -defined Function-like total for set ;
existence
not for b1 being ManySortedSet of I holds b1 is V9()
proof end;
cluster Relation-like V8() I -defined Function-like total for set ;
existence
not for b1 being ManySortedSet of I holds b1 is V8()
proof end;
end;

registration
let I be non empty set ;
cluster Relation-like V8() I -defined Function-like total -> V9() for set ;
coherence
for b1 being ManySortedSet of I st b1 is V8() holds
not b1 is V9()
proof end;
cluster Relation-like V9() I -defined Function-like total -> V8() for set ;
coherence
for b1 being ManySortedSet of I st b1 is V9() holds
not b1 is V8() ;
end;

theorem :: PBOOLE:129
for I being set
for X being ManySortedSet of I holds
( X is V9() iff X = EmptyMS I )
proof end;

theorem :: PBOOLE:130
for I being set
for X, Y being ManySortedSet of I st Y is V9() & X c= Y holds
X is V9()
proof end;

theorem Th131: :: PBOOLE:131
for I being set
for X, Y being ManySortedSet of I st X is V8() & X c= Y holds
Y is V8()
proof end;

theorem Th132: :: PBOOLE:132
for I being set
for X, Y being ManySortedSet of I st X is V8() & X [= Y holds
X c= Y
proof end;

theorem :: PBOOLE:133
for I being set
for X, Y being ManySortedSet of I st X is V8() & X [= Y holds
Y is V8()
proof end;

theorem :: PBOOLE:134
for I being set
for X being V8() ManySortedSet of I ex x being ManySortedSet of I st x in X
proof end;

theorem Th135: :: PBOOLE:135
for I being set
for Y being ManySortedSet of I
for X being V8() ManySortedSet of I st ( for x being ManySortedSet of I holds
( x in X iff x in Y ) ) holds
X = Y
proof end;

theorem :: PBOOLE:136
for I being set
for Y, Z being ManySortedSet of I
for X being V8() ManySortedSet of I st ( for x being ManySortedSet of I holds
( x in X iff ( x in Y & x in Z ) ) ) holds
X = Y (/\) Z
proof end;

scheme :: PBOOLE:sch 3
MSSEx{ F1() -> set , P1[ object , object ] } :
ex f being ManySortedSet of F1() st
for i being object st i in F1() holds
P1[i,f . i]
provided
A1: for i being object st i in F1() holds
ex j being object st P1[i,j]
proof end;

scheme :: PBOOLE:sch 4
MSSLambda{ F1() -> set , F2( object ) -> object } :
ex f being ManySortedSet of F1() st
for i being object st i in F1() holds
f . i = F2(i)
proof end;

registration
let I be set ;
cluster Relation-like I -defined Function-like total Function-yielding for set ;
existence
ex b1 being ManySortedSet of I st b1 is Function-yielding
proof end;
end;

definition
let I be set ;
mode ManySortedFunction of I is Function-yielding ManySortedSet of I;
end;

theorem :: PBOOLE:137
for I being set
for M being V8() ManySortedSet of I holds not {} in rng M
proof end;

definition
let I be set ;
let M be ManySortedSet of I;
mode Component of M is Element of rng M;
end;

theorem :: PBOOLE:138
for I being non empty set
for M being ManySortedSet of I
for A being Component of M ex i being object st
( i in I & A = M . i )
proof end;

theorem :: PBOOLE:139
for I being set
for M being ManySortedSet of I
for i being object st i in I holds
M . i is Component of M
proof end;

definition
let I be set ;
let B be ManySortedSet of I;
mode Element of B -> ManySortedSet of I means :: PBOOLE:def 14
 for i being object st i in I holds
it . i is Element of B . i;
existence
ex b1 being ManySortedSet of I st
for i being object st i in I holds
b1 . i is Element of B . i
proof end;
end;

:: deftheorem defines Element PBOOLE:def 14 :
for I being set
for B, b3 being ManySortedSet of I holds
( b3 is Element of B iff for i being object st i in I holds
b3 . i is Element of B . i );

definition
let I be set ;
let A, B be ManySortedSet of I;
mode ManySortedFunction of A,B -> ManySortedSet of I means :Def15: :: PBOOLE:def 15
 for i being object st i in I holds
it . i is Function of (A . i),(B . i);
correctness
existence
ex b1 being ManySortedSet of I st
for i being object st i in I holds
b1 . i is Function of (A . i),(B . i);
proof end;
end;

:: deftheorem Def15 defines ManySortedFunction PBOOLE:def 15 :
for I being set
for A, B, b4 being ManySortedSet of I holds
( b4 is ManySortedFunction of A,B iff for i being object st i in I holds
b4 . i is Function of (A . i),(B . i) );

registration
let I be set ;
let A, B be ManySortedSet of I;
cluster -> Function-yielding for ManySortedFunction of A,B;
coherence
for b1 being ManySortedFunction of A,B holds b1 is Function-yielding
proof end;
end;

registration
let I be set ;
let J be non empty set ;
let O be Function of I,J;
let F be ManySortedSet of J;
cluster O * F -> I -defined total for I -defined Function;
coherence
for b1 being I -defined Function st b1 = F * O holds
b1 is total
proof end;
end;

scheme :: PBOOLE:sch 5
LambdaDMS{ F1() -> non empty set , F2( object ) -> object } :
ex X being ManySortedSet of F1() st
for d being Element of F1() holds X . d = F2(d)
proof end;

registration
let J be non empty set ;
let B be V8() ManySortedSet of J;
let j be Element of J;
cluster B . j -> non empty ;
coherence
not B . j is empty by Def13;
end;

definition
let I be set ;
let X, Y be ManySortedSet of I;
func [|X,Y|] -> ManySortedSet of I means :: PBOOLE:def 16
 for i being object st i in I holds
it . i = [:(X . i),(Y . i):];
existence
ex b1 being ManySortedSet of I st
for i being object st i in I holds
b1 . i = [:(X . i),(Y . i):]
proof end;
uniqueness
for b1, b2 being ManySortedSet of I st ( for i being object st i in I holds
b1 . i = [:(X . i),(Y . i):] ) & ( for i being object st i in I holds
b2 . i = [:(X . i),(Y . i):] ) holds
b1 = b2
proof end;
end;

:: deftheorem defines [| PBOOLE:def 16 :
for I being set
for X, Y, b4 being ManySortedSet of I holds
( b4 = [|X,Y|] iff for i being object st i in I holds
b4 . i = [:(X . i),(Y . i):] );

definition
let I be set ;
let X, Y be ManySortedSet of I;
deffunc H1( object ) -> set = Funcs ((X . $1),(Y . $1));
func (Funcs) (X,Y) -> ManySortedSet of I means :: PBOOLE:def 17
 for i being object st i in I holds
it . i = Funcs ((X . i),(Y . i));
existence
ex b1 being ManySortedSet of I st
for i being object st i in I holds
b1 . i = Funcs ((X . i),(Y . i))
proof end;
uniqueness
for b1, b2 being ManySortedSet of I st ( for i being object st i in I holds
b1 . i = Funcs ((X . i),(Y . i)) ) & ( for i being object st i in I holds
b2 . i = Funcs ((X . i),(Y . i)) ) holds
b1 = b2
proof end;
end;

:: deftheorem defines (Funcs) PBOOLE:def 17 :
for I being set
for X, Y, b4 being ManySortedSet of I holds
( b4 = (Funcs) (X,Y) iff for i being object st i in I holds
b4 . i = Funcs ((X . i),(Y . i)) );

definition
let I be set ;
let M be ManySortedSet of I;
mode ManySortedSubset of M -> ManySortedSet of I means :Def18: :: PBOOLE:def 18
it c= M;
existence
ex b1 being ManySortedSet of I st b1 c= M ;
end;

:: deftheorem Def18 defines ManySortedSubset PBOOLE:def 18 :
for I being set
for M, b3 being ManySortedSet of I holds
( b3 is ManySortedSubset of M iff b3 c= M );

registration
let I be set ;
let M be V8() ManySortedSet of I;
cluster Relation-like V8() I -defined Function-like total for ManySortedSubset of M;
existence
not for b1 being ManySortedSubset of M holds b1 is V8()
proof end;
end;

definition
let F, G be Function-yielding Function;
func G ** F -> Function means :Def19: :: PBOOLE:def 19
( dom it = (dom F) /\ (dom G) & ( for i being object st i in dom it holds
it . i = (G . i) * (F . i) ) );
existence
ex b1 being Function st
( dom b1 = (dom F) /\ (dom G) & ( for i being object st i in dom b1 holds
b1 . i = (G . i) * (F . i) ) )
proof end;
uniqueness
for b1, b2 being Function st dom b1 = (dom F) /\ (dom G) & ( for i being object st i in dom b1 holds
b1 . i = (G . i) * (F . i) ) & dom b2 = (dom F) /\ (dom G) & ( for i being object st i in dom b2 holds
b2 . i = (G . i) * (F . i) ) holds
b1 = b2
proof end;
end;

:: deftheorem Def19 defines ** PBOOLE:def 19 :
for F, G being Function-yielding Function
for b3 being Function holds
( b3 = G ** F iff ( dom b3 = (dom F) /\ (dom G) & ( for i being object st i in dom b3 holds
b3 . i = (G . i) * (F . i) ) ) );

registration
let F, G be Function-yielding Function;
cluster G ** F -> Function-yielding ;
coherence
G ** F is Function-yielding
proof end;
end;

definition
let I be set ;
let A be ManySortedSet of I;
let F be ManySortedFunction of I;
func F .:.: A -> ManySortedSet of I means :: PBOOLE:def 20
 for i being set st i in I holds
it . i = (F . i) .: (A . i);
existence
ex b1 being ManySortedSet of I st
for i being set st i in I holds
b1 . i = (F . i) .: (A . i)
proof end;
uniqueness
for b1, b2 being ManySortedSet of I st ( for i being set st i in I holds
b1 . i = (F . i) .: (A . i) ) & ( for i being set st i in I holds
b2 . i = (F . i) .: (A . i) ) holds
b1 = b2
proof end;
end;

:: deftheorem defines .:.: PBOOLE:def 20 :
for I being set
for A being ManySortedSet of I
for F being ManySortedFunction of I
for b4 being ManySortedSet of I holds
( b4 = F .:.: A iff for i being set st i in I holds
b4 . i = (F . i) .: (A . i) );

registration
let I be set ;
cluster EmptyMS I -> V9() ;
coherence
EmptyMS I is empty-yielding by FUNCOP_1:13;
end;

scheme :: PBOOLE:sch 6
MSSExD{ F1() -> non empty set , P1[ object , object ] } :
ex f being ManySortedSet of F1() st
for i being Element of F1() holds P1[i,f . i]
provided
A1: for i being Element of F1() ex j being object st P1[i,j]
proof end;

registration
let A be non empty set ;
cluster Relation-like V8() A -defined Function-like total -> V9() for set ;
coherence
for b1 being ManySortedSet of A st b1 is V8() holds
not b1 is V9() ;
end;

registration
let X be non empty set ;
cluster Relation-like X -defined Function-like total -> non empty for set ;
coherence
for b1 being ManySortedSet of X holds not b1 is empty ;
end;

theorem :: PBOOLE:140
for F, G, H being Function-yielding Function holds (H ** G) ** F = H ** (G ** F)
proof end;

registration
let I be set ;
let f be V8() ManySortedSet of I;
cluster Relation-like I -defined Function-like f -compatible total for set ;
existence
ex b1 being I -defined f -compatible Function st b1 is total
proof end;
end;

theorem :: PBOOLE:141
for I being set
for f being V8() ManySortedSet of I
for p being b1 -defined b2 -compatible Function ex s being b2 -compatible ManySortedSet of I st p c= s
proof end;

theorem :: PBOOLE:142
for I, A being set
for s, ss being ManySortedSet of I holds (ss +* (s | A)) | A = s | A
proof end;

registration
let X be non empty set ;
let Y be set ;
cluster Relation-like Y -defined X -valued Function-like total for set ;
existence
ex b1 being ManySortedSet of Y st b1 is X -valued
proof end;
end;

theorem :: PBOOLE:143
for I, Y being non empty set
for M being b2 -valued ManySortedSet of I
for x being Element of I holds M . x = M /. x
proof end;

theorem :: PBOOLE:144
for I being set
for f being Function
for M being ManySortedSet of I holds (f +* M) | I = M
proof end;

theorem :: PBOOLE:145
for I being set
for Y being non empty set
for p being b1 -defined b2 -valued Function ex s being b2 -valued ManySortedSet of I st p c= s
proof end;

theorem :: PBOOLE:146
for I being set
for X, Y being ManySortedSet of I st X c= Y & Y c= X holds
X = Y by Lm1;

definition
let I be non empty set ;
let A, B be ManySortedSet of I;
:: original: =
redefine pred A = B means :: PBOOLE:def 21
 for i being Element of I holds A . i = B . i;
compatibility
( A = B iff for i being Element of I holds A . i = B . i ) ;
end;

:: deftheorem defines = PBOOLE:def 21 :
for I being non empty set
for A, B being ManySortedSet of I holds
( A = B iff for i being Element of I holds A . i = B . i );

registration
let X be with_non-empty_elements set ;
cluster id X -> non-empty ;
coherence
id X is non-empty by SETFAM_1:def 8;
end;

scheme :: PBOOLE:sch 7
MSSLambda{ F1() -> set , F2( object ) -> object } :
ex f being ManySortedSet of F1() st
for i being set st i in F1() holds
f . i = F2(i)
proof end;