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Theorem sconpi1 29750
Description: A path-connected topological space is simply connected iff its fundamental group is trivial. (Contributed by Mario Carneiro, 12-Feb-2015.)
Hypothesis
Ref Expression
sconpi1.1  |-  X  = 
U. J
Assertion
Ref Expression
sconpi1  |-  ( ( J  e. PCon  /\  Y  e.  X )  ->  ( J  e. SCon  <->  ( Base `  ( J  pi1  Y ) )  ~~  1o ) )

Proof of Theorem sconpi1
Dummy variables  f  x are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 scontop 29739 . . . . . . . . 9  |-  ( J  e. SCon  ->  J  e.  Top )
21adantl 467 . . . . . . . 8  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  J  e.  Top )
3 simpl 458 . . . . . . . 8  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  Y  e.  X )
4 eqid 2429 . . . . . . . . 9  |-  ( J  pi1  Y )  =  ( J  pi1  Y )
5 eqid 2429 . . . . . . . . 9  |-  ( Base `  ( J  pi1  Y ) )  =  ( Base `  ( J  pi1  Y ) )
6 simpl 458 . . . . . . . . . 10  |-  ( ( J  e.  Top  /\  Y  e.  X )  ->  J  e.  Top )
7 sconpi1.1 . . . . . . . . . . 11  |-  X  = 
U. J
87toptopon 19879 . . . . . . . . . 10  |-  ( J  e.  Top  <->  J  e.  (TopOn `  X ) )
96, 8sylib 199 . . . . . . . . 9  |-  ( ( J  e.  Top  /\  Y  e.  X )  ->  J  e.  (TopOn `  X ) )
10 simpr 462 . . . . . . . . 9  |-  ( ( J  e.  Top  /\  Y  e.  X )  ->  Y  e.  X )
114, 5, 9, 10elpi1 21969 . . . . . . . 8  |-  ( ( J  e.  Top  /\  Y  e.  X )  ->  ( x  e.  (
Base `  ( J  pi1  Y )
)  <->  E. f  e.  ( II  Cn  J ) ( ( ( f `
 0 )  =  Y  /\  ( f `
 1 )  =  Y )  /\  x  =  [ f ] ( 
~=ph  `  J ) ) ) )
122, 3, 11syl2anc 665 . . . . . . 7  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  ( x  e.  ( Base `  ( J  pi1  Y ) )  <->  E. f  e.  ( II  Cn  J
) ( ( ( f `  0 )  =  Y  /\  (
f `  1 )  =  Y )  /\  x  =  [ f ] ( 
~=ph  `  J ) ) ) )
13 phtpcer 21919 . . . . . . . . . . . . 13  |-  (  ~=ph  `  J )  Er  (
II  Cn  J )
1413a1i 11 . . . . . . . . . . . 12  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  (  ~=ph  `  J )  Er  (
II  Cn  J )
)
15 simpllr 767 . . . . . . . . . . . . . 14  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  J  e. SCon )
16 simplr 760 . . . . . . . . . . . . . 14  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  f  e.  ( II  Cn  J
) )
17 simprl 762 . . . . . . . . . . . . . . 15  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  ( f `  0 )  =  Y )
18 simprr 764 . . . . . . . . . . . . . . 15  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  ( f `  1 )  =  Y )
1917, 18eqtr4d 2473 . . . . . . . . . . . . . 14  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  ( f `  0 )  =  ( f `  1
) )
20 sconpht 29740 . . . . . . . . . . . . . 14  |-  ( ( J  e. SCon  /\  f  e.  ( II  Cn  J
)  /\  ( f `  0 )  =  ( f `  1
) )  ->  f
(  ~=ph  `  J )
( ( 0 [,] 1 )  X.  {
( f `  0
) } ) )
2115, 16, 19, 20syl3anc 1264 . . . . . . . . . . . . 13  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  f (  ~=ph  `  J ) ( ( 0 [,] 1 )  X.  { ( f `
 0 ) } ) )
2217sneqd 4014 . . . . . . . . . . . . . 14  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  { (
f `  0 ) }  =  { Y } )
2322xpeq2d 4878 . . . . . . . . . . . . 13  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  ( (
0 [,] 1 )  X.  { ( f `
 0 ) } )  =  ( ( 0 [,] 1 )  X.  { Y }
) )
2421, 23breqtrd 4450 . . . . . . . . . . . 12  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  f (  ~=ph  `  J ) ( ( 0 [,] 1 )  X.  { Y }
) )
2514, 24erthi 7418 . . . . . . . . . . 11  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  [ f ] (  ~=ph  `  J
)  =  [ ( ( 0 [,] 1
)  X.  { Y } ) ] ( 
~=ph  `  J ) )
262, 8sylib 199 . . . . . . . . . . . . 13  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  J  e.  (TopOn `  X
) )
27 eqid 2429 . . . . . . . . . . . . . 14  |-  ( ( 0 [,] 1 )  X.  { Y }
)  =  ( ( 0 [,] 1 )  X.  { Y }
)
284, 27pi1id 21975 . . . . . . . . . . . . 13  |-  ( ( J  e.  (TopOn `  X )  /\  Y  e.  X )  ->  [ ( ( 0 [,] 1
)  X.  { Y } ) ] ( 
~=ph  `  J )  =  ( 0g `  ( J  pi1  Y ) ) )
2926, 3, 28syl2anc 665 . . . . . . . . . . . 12  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  [ ( ( 0 [,] 1 )  X.  { Y } ) ] ( 
~=ph  `  J )  =  ( 0g `  ( J  pi1  Y ) ) )
3029ad2antrr 730 . . . . . . . . . . 11  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  [ (
( 0 [,] 1
)  X.  { Y } ) ] ( 
~=ph  `  J )  =  ( 0g `  ( J  pi1  Y ) ) )
3125, 30eqtrd 2470 . . . . . . . . . 10  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  [ f ] (  ~=ph  `  J
)  =  ( 0g
`  ( J  pi1  Y ) ) )
32 elsn 4016 . . . . . . . . . . 11  |-  ( x  e.  { ( 0g
`  ( J  pi1  Y ) ) }  <->  x  =  ( 0g `  ( J  pi1  Y ) ) )
33 eqeq1 2433 . . . . . . . . . . 11  |-  ( x  =  [ f ] (  ~=ph  `  J )  ->  ( x  =  ( 0g `  ( J  pi1  Y ) )  <->  [ f ] ( 
~=ph  `  J )  =  ( 0g `  ( J  pi1  Y ) ) ) )
3432, 33syl5bb 260 . . . . . . . . . 10  |-  ( x  =  [ f ] (  ~=ph  `  J )  ->  ( x  e. 
{ ( 0g `  ( J  pi1  Y ) ) }  <->  [ f ] ( 
~=ph  `  J )  =  ( 0g `  ( J  pi1  Y ) ) ) )
3531, 34syl5ibrcom 225 . . . . . . . . 9  |-  ( ( ( ( Y  e.  X  /\  J  e. SCon
)  /\  f  e.  ( II  Cn  J
) )  /\  (
( f `  0
)  =  Y  /\  ( f `  1
)  =  Y ) )  ->  ( x  =  [ f ] ( 
~=ph  `  J )  ->  x  e.  { ( 0g `  ( J  pi1  Y ) ) } ) )
3635expimpd 606 . . . . . . . 8  |-  ( ( ( Y  e.  X  /\  J  e. SCon )  /\  f  e.  ( II  Cn  J ) )  -> 
( ( ( ( f `  0 )  =  Y  /\  (
f `  1 )  =  Y )  /\  x  =  [ f ] ( 
~=ph  `  J ) )  ->  x  e.  {
( 0g `  ( J  pi1  Y ) ) } ) )
3736rexlimdva 2924 . . . . . . 7  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  ( E. f  e.  ( II  Cn  J ) ( ( ( f `
 0 )  =  Y  /\  ( f `
 1 )  =  Y )  /\  x  =  [ f ] ( 
~=ph  `  J ) )  ->  x  e.  {
( 0g `  ( J  pi1  Y ) ) } ) )
3812, 37sylbid 218 . . . . . 6  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  ( x  e.  ( Base `  ( J  pi1  Y ) )  ->  x  e.  { ( 0g `  ( J  pi1  Y ) ) } ) )
3938ssrdv 3476 . . . . 5  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  (
Base `  ( J  pi1  Y )
)  C_  { ( 0g `  ( J  pi1  Y ) ) } )
404pi1grp 21974 . . . . . . . 8  |-  ( ( J  e.  (TopOn `  X )  /\  Y  e.  X )  ->  ( J  pi1  Y )  e.  Grp )
4126, 3, 40syl2anc 665 . . . . . . 7  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  ( J  pi1  Y )  e.  Grp )
42 eqid 2429 . . . . . . . 8  |-  ( 0g
`  ( J  pi1  Y ) )  =  ( 0g `  ( J  pi1  Y ) )
435, 42grpidcl 16645 . . . . . . 7  |-  ( ( J  pi1  Y )  e.  Grp  ->  ( 0g `  ( J  pi1  Y ) )  e.  ( Base `  ( J  pi1  Y ) ) )
4441, 43syl 17 . . . . . 6  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  ( 0g `  ( J  pi1  Y ) )  e.  ( Base `  ( J  pi1  Y ) ) )
4544snssd 4148 . . . . 5  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  { ( 0g `  ( J  pi1  Y ) ) }  C_  ( Base `  ( J  pi1  Y ) ) )
4639, 45eqssd 3487 . . . 4  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  (
Base `  ( J  pi1  Y )
)  =  { ( 0g `  ( J  pi1  Y ) ) } )
47 fvex 5891 . . . . 5  |-  ( 0g
`  ( J  pi1  Y ) )  e.  _V
4847ensn1 7640 . . . 4  |-  { ( 0g `  ( J  pi1  Y ) ) }  ~~  1o
4946, 48syl6eqbr 4463 . . 3  |-  ( ( Y  e.  X  /\  J  e. SCon )  ->  (
Base `  ( J  pi1  Y )
)  ~~  1o )
5049adantll 718 . 2  |-  ( ( ( J  e. PCon  /\  Y  e.  X )  /\  J  e. SCon )  -> 
( Base `  ( J  pi1  Y )
)  ~~  1o )
51 simpll 758 . . 3  |-  ( ( ( J  e. PCon  /\  Y  e.  X )  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  ->  J  e. PCon )
52 eqid 2429 . . . . . . . . 9  |-  ( J  pi1  ( f `
 0 ) )  =  ( J  pi1  ( f ` 
0 ) )
53 eqid 2429 . . . . . . . . 9  |-  ( Base `  ( J  pi1 
( f `  0
) ) )  =  ( Base `  ( J  pi1  ( f `
 0 ) ) )
54 simplll 766 . . . . . . . . . . 11  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  J  e. PCon )
55 pcontop 29736 . . . . . . . . . . 11  |-  ( J  e. PCon  ->  J  e.  Top )
5654, 55syl 17 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  J  e.  Top )
5756, 8sylib 199 . . . . . . . . 9  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  J  e.  (TopOn `  X ) )
58 simprl 762 . . . . . . . . . . 11  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  f  e.  ( II  Cn  J
) )
59 iiuni 21809 . . . . . . . . . . . 12  |-  ( 0 [,] 1 )  = 
U. II
6059, 7cnf 20193 . . . . . . . . . . 11  |-  ( f  e.  ( II  Cn  J )  ->  f : ( 0 [,] 1 ) --> X )
6158, 60syl 17 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  f :
( 0 [,] 1
) --> X )
62 0elunit 11748 . . . . . . . . . 10  |-  0  e.  ( 0 [,] 1
)
63 ffvelrn 6035 . . . . . . . . . 10  |-  ( ( f : ( 0 [,] 1 ) --> X  /\  0  e.  ( 0 [,] 1 ) )  ->  ( f `  0 )  e.  X )
6461, 62, 63sylancl 666 . . . . . . . . 9  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( f `  0 )  e.  X )
65 eqidd 2430 . . . . . . . . 9  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( f `  0 )  =  ( f `  0
) )
66 simprr 764 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( f `  0 )  =  ( f `  1
) )
6766eqcomd 2437 . . . . . . . . 9  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( f `  1 )  =  ( f `  0
) )
6852, 53, 57, 64, 58, 65, 67elpi1i 21970 . . . . . . . 8  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  [ f ] (  ~=ph  `  J
)  e.  ( Base `  ( J  pi1 
( f `  0
) ) ) )
69 eqid 2429 . . . . . . . . . . . . 13  |-  ( ( 0 [,] 1 )  X.  { ( f `
 0 ) } )  =  ( ( 0 [,] 1 )  X.  { ( f `
 0 ) } )
7069pcoptcl 21945 . . . . . . . . . . . 12  |-  ( ( J  e.  (TopOn `  X )  /\  (
f `  0 )  e.  X )  ->  (
( ( 0 [,] 1 )  X.  {
( f `  0
) } )  e.  ( II  Cn  J
)  /\  ( (
( 0 [,] 1
)  X.  { ( f `  0 ) } ) `  0
)  =  ( f `
 0 )  /\  ( ( ( 0 [,] 1 )  X. 
{ ( f ` 
0 ) } ) `
 1 )  =  ( f `  0
) ) )
7157, 64, 70syl2anc 665 . . . . . . . . . . 11  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( (
( 0 [,] 1
)  X.  { ( f `  0 ) } )  e.  ( II  Cn  J )  /\  ( ( ( 0 [,] 1 )  X.  { ( f `
 0 ) } ) `  0 )  =  ( f ` 
0 )  /\  (
( ( 0 [,] 1 )  X.  {
( f `  0
) } ) ` 
1 )  =  ( f `  0 ) ) )
7271simp1d 1017 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( (
0 [,] 1 )  X.  { ( f `
 0 ) } )  e.  ( II 
Cn  J ) )
7371simp2d 1018 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( (
( 0 [,] 1
)  X.  { ( f `  0 ) } ) `  0
)  =  ( f `
 0 ) )
7471simp3d 1019 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( (
( 0 [,] 1
)  X.  { ( f `  0 ) } ) `  1
)  =  ( f `
 0 ) )
7552, 53, 57, 64, 72, 73, 74elpi1i 21970 . . . . . . . . 9  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  [ (
( 0 [,] 1
)  X.  { ( f `  0 ) } ) ] ( 
~=ph  `  J )  e.  ( Base `  ( J  pi1  ( f `
 0 ) ) ) )
76 simpllr 767 . . . . . . . . . . . 12  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  Y  e.  X )
777, 52, 4, 53, 5pconpi1 29748 . . . . . . . . . . . 12  |-  ( ( J  e. PCon  /\  (
f `  0 )  e.  X  /\  Y  e.  X )  ->  ( J  pi1  ( f `
 0 ) ) 
~=g𝑔 
( J  pi1  Y ) )
7854, 64, 76, 77syl3anc 1264 . . . . . . . . . . 11  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( J  pi1  ( f `  0 ) ) 
~=g𝑔 
( J  pi1  Y ) )
7953, 5gicen 16892 . . . . . . . . . . 11  |-  ( ( J  pi1  ( f `  0 ) )  ~=g𝑔  ( J  pi1  Y )  ->  ( Base `  ( J  pi1  ( f ` 
0 ) ) ) 
~~  ( Base `  ( J  pi1  Y ) ) )
8078, 79syl 17 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( Base `  ( J  pi1 
( f `  0
) ) )  ~~  ( Base `  ( J  pi1  Y )
) )
81 simplr 760 . . . . . . . . . 10  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( Base `  ( J  pi1  Y ) )  ~~  1o )
82 entr 7628 . . . . . . . . . 10  |-  ( ( ( Base `  ( J  pi1  ( f `
 0 ) ) )  ~~  ( Base `  ( J  pi1  Y ) )  /\  ( Base `  ( J  pi1  Y )
)  ~~  1o )  ->  ( Base `  ( J  pi1  ( f `
 0 ) ) )  ~~  1o )
8380, 81, 82syl2anc 665 . . . . . . . . 9  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( Base `  ( J  pi1 
( f `  0
) ) )  ~~  1o )
84 en1eqsn 7807 . . . . . . . . 9  |-  ( ( [ ( ( 0 [,] 1 )  X. 
{ ( f ` 
0 ) } ) ] (  ~=ph  `  J
)  e.  ( Base `  ( J  pi1 
( f `  0
) ) )  /\  ( Base `  ( J  pi1  ( f `  0 ) ) )  ~~  1o )  ->  ( Base `  ( J  pi1  ( f `
 0 ) ) )  =  { [
( ( 0 [,] 1 )  X.  {
( f `  0
) } ) ] (  ~=ph  `  J ) } )
8575, 83, 84syl2anc 665 . . . . . . . 8  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( Base `  ( J  pi1 
( f `  0
) ) )  =  { [ ( ( 0 [,] 1 )  X.  { ( f `
 0 ) } ) ] (  ~=ph  `  J ) } )
8668, 85eleqtrd 2519 . . . . . . 7  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  [ f ] (  ~=ph  `  J
)  e.  { [
( ( 0 [,] 1 )  X.  {
( f `  0
) } ) ] (  ~=ph  `  J ) } )
87 elsni 4027 . . . . . . 7  |-  ( [ f ] (  ~=ph  `  J )  e.  { [ ( ( 0 [,] 1 )  X. 
{ ( f ` 
0 ) } ) ] (  ~=ph  `  J
) }  ->  [ f ] (  ~=ph  `  J
)  =  [ ( ( 0 [,] 1
)  X.  { ( f `  0 ) } ) ] ( 
~=ph  `  J ) )
8886, 87syl 17 . . . . . 6  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  [ f ] (  ~=ph  `  J
)  =  [ ( ( 0 [,] 1
)  X.  { ( f `  0 ) } ) ] ( 
~=ph  `  J ) )
8913a1i 11 . . . . . . 7  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  (  ~=ph  `  J )  Er  (
II  Cn  J )
)
9089, 58erth 7416 . . . . . 6  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  ( f
(  ~=ph  `  J )
( ( 0 [,] 1 )  X.  {
( f `  0
) } )  <->  [ f ] (  ~=ph  `  J
)  =  [ ( ( 0 [,] 1
)  X.  { ( f `  0 ) } ) ] ( 
~=ph  `  J ) ) )
9188, 90mpbird 235 . . . . 5  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  (
f  e.  ( II 
Cn  J )  /\  ( f `  0
)  =  ( f `
 1 ) ) )  ->  f (  ~=ph  `  J ) ( ( 0 [,] 1 )  X.  { ( f `
 0 ) } ) )
9291expr 618 . . . 4  |-  ( ( ( ( J  e. PCon  /\  Y  e.  X
)  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  /\  f  e.  ( II  Cn  J
) )  ->  (
( f `  0
)  =  ( f `
 1 )  -> 
f (  ~=ph  `  J
) ( ( 0 [,] 1 )  X. 
{ ( f ` 
0 ) } ) ) )
9392ralrimiva 2846 . . 3  |-  ( ( ( J  e. PCon  /\  Y  e.  X )  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  ->  A. f  e.  ( II  Cn  J ) ( ( f ` 
0 )  =  ( f `  1 )  ->  f (  ~=ph  `  J ) ( ( 0 [,] 1 )  X.  { ( f `
 0 ) } ) ) )
94 isscon 29737 . . 3  |-  ( J  e. SCon 
<->  ( J  e. PCon  /\  A. f  e.  ( II 
Cn  J ) ( ( f `  0
)  =  ( f `
 1 )  -> 
f (  ~=ph  `  J
) ( ( 0 [,] 1 )  X. 
{ ( f ` 
0 ) } ) ) ) )
9551, 93, 94sylanbrc 668 . 2  |-  ( ( ( J  e. PCon  /\  Y  e.  X )  /\  ( Base `  ( J  pi1  Y ) )  ~~  1o )  ->  J  e. SCon )
9650, 95impbida 840 1  |-  ( ( J  e. PCon  /\  Y  e.  X )  ->  ( J  e. SCon  <->  ( Base `  ( J  pi1  Y ) )  ~~  1o ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 187    /\ wa 370    /\ w3a 982    = wceq 1437    e. wcel 1870   A.wral 2782   E.wrex 2783   {csn 4002   U.cuni 4222   class class class wbr 4426    X. cxp 4852   -->wf 5597   ` cfv 5601  (class class class)co 6305   1oc1o 7183    Er wer 7368   [cec 7369    ~~ cen 7574   0cc0 9538   1c1 9539   [,]cicc 11638   Basecbs 15084   0gc0g 15297   Grpcgrp 16620    ~=g𝑔 cgic 16873   Topctop 19848  TopOnctopon 19849    Cn ccn 20171   IIcii 21803    ~=ph cphtpc 21893    pi1 cpi1 21927  PConcpcon 29730  SConcscon 29731
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1665  ax-4 1678  ax-5 1751  ax-6 1797  ax-7 1841  ax-8 1872  ax-9 1874  ax-10 1889  ax-11 1894  ax-12 1907  ax-13 2055  ax-ext 2407  ax-rep 4538  ax-sep 4548  ax-nul 4556  ax-pow 4603  ax-pr 4661  ax-un 6597  ax-inf2 8146  ax-cnex 9594  ax-resscn 9595  ax-1cn 9596  ax-icn 9597  ax-addcl 9598  ax-addrcl 9599  ax-mulcl 9600  ax-mulrcl 9601  ax-mulcom 9602  ax-addass 9603  ax-mulass 9604  ax-distr 9605  ax-i2m1 9606  ax-1ne0 9607  ax-1rid 9608  ax-rnegex 9609  ax-rrecex 9610  ax-cnre 9611  ax-pre-lttri 9612  ax-pre-lttrn 9613  ax-pre-ltadd 9614  ax-pre-mulgt0 9615  ax-pre-sup 9616  ax-addf 9617  ax-mulf 9618
This theorem depends on definitions:  df-bi 188  df-or 371  df-an 372  df-3or 983  df-3an 984  df-tru 1440  df-ex 1660  df-nf 1664  df-sb 1790  df-eu 2270  df-mo 2271  df-clab 2415  df-cleq 2421  df-clel 2424  df-nfc 2579  df-ne 2627  df-nel 2628  df-ral 2787  df-rex 2788  df-reu 2789  df-rmo 2790  df-rab 2791  df-v 3089  df-sbc 3306  df-csb 3402  df-dif 3445  df-un 3447  df-in 3449  df-ss 3456  df-pss 3458  df-nul 3768  df-if 3916  df-pw 3987  df-sn 4003  df-pr 4005  df-tp 4007  df-op 4009  df-uni 4223  df-int 4259  df-iun 4304  df-iin 4305  df-br 4427  df-opab 4485  df-mpt 4486  df-tr 4521  df-eprel 4765  df-id 4769  df-po 4775  df-so 4776  df-fr 4813  df-se 4814  df-we 4815  df-xp 4860  df-rel 4861  df-cnv 4862  df-co 4863  df-dm 4864  df-rn 4865  df-res 4866  df-ima 4867  df-pred 5399  df-ord 5445  df-on 5446  df-lim 5447  df-suc 5448  df-iota 5565  df-fun 5603  df-fn 5604  df-f 5605  df-f1 5606  df-fo 5607  df-f1o 5608  df-fv 5609  df-isom 5610  df-riota 6267  df-ov 6308  df-oprab 6309  df-mpt2 6310  df-of 6545  df-om 6707  df-1st 6807  df-2nd 6808  df-supp 6926  df-wrecs 7036  df-recs 7098  df-rdg 7136  df-1o 7190  df-2o 7191  df-oadd 7194  df-er 7371  df-ec 7373  df-qs 7377  df-map 7482  df-ixp 7531  df-en 7578  df-dom 7579  df-sdom 7580  df-fin 7581  df-fsupp 7890  df-fi 7931  df-sup 7962  df-oi 8025  df-card 8372  df-cda 8596  df-pnf 9676  df-mnf 9677  df-xr 9678  df-ltxr 9679  df-le 9680  df-sub 9861  df-neg 9862  df-div 10269  df-nn 10610  df-2 10668  df-3 10669  df-4 10670  df-5 10671  df-6 10672  df-7 10673  df-8 10674  df-9 10675  df-10 10676  df-n0 10870  df-z 10938  df-dec 11052  df-uz 11160  df-q 11265  df-rp 11303  df-xneg 11409  df-xadd 11410  df-xmul 11411  df-ioo 11639  df-icc 11642  df-fz 11783  df-fzo 11914  df-seq 12211  df-exp 12270  df-hash 12513  df-cj 13141  df-re 13142  df-im 13143  df-sqrt 13277  df-abs 13278  df-struct 15086  df-ndx 15087  df-slot 15088  df-base 15089  df-sets 15090  df-ress 15091  df-plusg 15165  df-mulr 15166  df-starv 15167  df-sca 15168  df-vsca 15169  df-ip 15170  df-tset 15171  df-ple 15172  df-ds 15174  df-unif 15175  df-hom 15176  df-cco 15177  df-rest 15280  df-topn 15281  df-0g 15299  df-gsum 15300  df-topgen 15301  df-pt 15302  df-prds 15305  df-xrs 15359  df-qtop 15364  df-imas 15365  df-qus 15366  df-xps 15367  df-mre 15443  df-mrc 15444  df-acs 15446  df-mgm 16439  df-sgrp 16478  df-mnd 16488  df-submnd 16534  df-grp 16624  df-mulg 16627  df-ghm 16832  df-gim 16874  df-gic 16875  df-cntz 16922  df-cmn 17367  df-psmet 18897  df-xmet 18898  df-met 18899  df-bl 18900  df-mopn 18901  df-cnfld 18906  df-top 19852  df-bases 19853  df-topon 19854  df-topsp 19855  df-cld 19965  df-cn 20174  df-cnp 20175  df-tx 20508  df-hmeo 20701  df-xms 21266  df-ms 21267  df-tms 21268  df-ii 21805  df-htpy 21894  df-phtpy 21895  df-phtpc 21916  df-pco 21929  df-om1 21930  df-pi1 21932  df-pcon 29732  df-scon 29733
This theorem is referenced by: (None)
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