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Theorem isoini 6014
Description: Isomorphisms preserve initial segments. Proposition 6.31(2) of [TakeutiZaring] p. 33. (Contributed by NM, 20-Apr-2004.)
Assertion
Ref Expression
isoini  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  ( H " ( A  i^i  ( `' R " { D } ) ) )  =  ( B  i^i  ( `' S " { ( H `  D ) } ) ) )

Proof of Theorem isoini
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 dfima2 5123 . 2  |-  ( H
" ( A  i^i  ( `' R " { D } ) ) )  =  { y  |  E. x  e.  ( A  i^i  ( `' R " { D } ) ) x H y }
2 elin 3412 . . . 4  |-  ( y  e.  ( B  i^i  ( `' S " { ( H `  D ) } ) )  <->  ( y  e.  B  /\  y  e.  ( `' S " { ( H `  D ) } ) ) )
3 isof1o 6003 . . . . . . . . 9  |-  ( H 
Isom  R ,  S  ( A ,  B )  ->  H : A -1-1-onto-> B
)
4 f1ofo 5641 . . . . . . . . 9  |-  ( H : A -1-1-onto-> B  ->  H : A -onto-> B )
5 forn 5613 . . . . . . . . . 10  |-  ( H : A -onto-> B  ->  ran  H  =  B )
65eleq2d 2308 . . . . . . . . 9  |-  ( H : A -onto-> B  -> 
( y  e.  ran  H  <-> 
y  e.  B ) )
73, 4, 63syl 17 . . . . . . . 8  |-  ( H 
Isom  R ,  S  ( A ,  B )  ->  ( y  e. 
ran  H  <->  y  e.  B
) )
8 f1ofn 5635 . . . . . . . . 9  |-  ( H : A -1-1-onto-> B  ->  H  Fn  A )
9 fvelrnb 5744 . . . . . . . . 9  |-  ( H  Fn  A  ->  (
y  e.  ran  H  <->  E. x  e.  A  ( H `  x )  =  y ) )
103, 8, 93syl 17 . . . . . . . 8  |-  ( H 
Isom  R ,  S  ( A ,  B )  ->  ( y  e. 
ran  H  <->  E. x  e.  A  ( H `  x )  =  y ) )
117, 10bitr3d 190 . . . . . . 7  |-  ( H 
Isom  R ,  S  ( A ,  B )  ->  ( y  e.  B  <->  E. x  e.  A  ( H `  x )  =  y ) )
1211adantr 276 . . . . . 6  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
y  e.  B  <->  E. x  e.  A  ( H `  x )  =  y ) )
133, 8syl 14 . . . . . . . 8  |-  ( H 
Isom  R ,  S  ( A ,  B )  ->  H  Fn  A
)
1413anim1i 340 . . . . . . 7  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  ( H  Fn  A  /\  D  e.  A )
)
15 funfvex 5707 . . . . . . . 8  |-  ( ( Fun  H  /\  D  e.  dom  H )  -> 
( H `  D
)  e.  _V )
1615funfni 5478 . . . . . . 7  |-  ( ( H  Fn  A  /\  D  e.  A )  ->  ( H `  D
)  e.  _V )
17 vex 2824 . . . . . . . 8  |-  y  e. 
_V
1817eliniseg 5152 . . . . . . 7  |-  ( ( H `  D )  e.  _V  ->  (
y  e.  ( `' S " { ( H `  D ) } )  <->  y S
( H `  D
) ) )
1914, 16, 183syl 17 . . . . . 6  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
y  e.  ( `' S " { ( H `  D ) } )  <->  y S
( H `  D
) ) )
2012, 19anbi12d 477 . . . . 5  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
( y  e.  B  /\  y  e.  ( `' S " { ( H `  D ) } ) )  <->  ( E. x  e.  A  ( H `  x )  =  y  /\  y S ( H `  D ) ) ) )
21 elin 3412 . . . . . . . . . . . 12  |-  ( x  e.  ( A  i^i  ( `' R " { D } ) )  <->  ( x  e.  A  /\  x  e.  ( `' R " { D } ) ) )
22 vex 2824 . . . . . . . . . . . . . 14  |-  x  e. 
_V
2322eliniseg 5152 . . . . . . . . . . . . 13  |-  ( D  e.  A  ->  (
x  e.  ( `' R " { D } )  <->  x R D ) )
2423anbi2d 468 . . . . . . . . . . . 12  |-  ( D  e.  A  ->  (
( x  e.  A  /\  x  e.  ( `' R " { D } ) )  <->  ( x  e.  A  /\  x R D ) ) )
2521, 24bitrid 192 . . . . . . . . . . 11  |-  ( D  e.  A  ->  (
x  e.  ( A  i^i  ( `' R " { D } ) )  <->  ( x  e.  A  /\  x R D ) ) )
2625anbi1d 469 . . . . . . . . . 10  |-  ( D  e.  A  ->  (
( x  e.  ( A  i^i  ( `' R " { D } ) )  /\  x H y )  <->  ( (
x  e.  A  /\  x R D )  /\  x H y ) ) )
27 anass 405 . . . . . . . . . 10  |-  ( ( ( x  e.  A  /\  x R D )  /\  x H y )  <->  ( x  e.  A  /\  ( x R D  /\  x H y ) ) )
2826, 27bitrdi 196 . . . . . . . . 9  |-  ( D  e.  A  ->  (
( x  e.  ( A  i^i  ( `' R " { D } ) )  /\  x H y )  <->  ( x  e.  A  /\  (
x R D  /\  x H y ) ) ) )
2928adantl 277 . . . . . . . 8  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
( x  e.  ( A  i^i  ( `' R " { D } ) )  /\  x H y )  <->  ( x  e.  A  /\  (
x R D  /\  x H y ) ) ) )
30 isorel 6004 . . . . . . . . . . . . . 14  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  (
x  e.  A  /\  D  e.  A )
)  ->  ( x R D  <->  ( H `  x ) S ( H `  D ) ) )
31 fnbrfvb 5735 . . . . . . . . . . . . . . . . 17  |-  ( ( H  Fn  A  /\  x  e.  A )  ->  ( ( H `  x )  =  y  <-> 
x H y ) )
3231bicomd 141 . . . . . . . . . . . . . . . 16  |-  ( ( H  Fn  A  /\  x  e.  A )  ->  ( x H y  <-> 
( H `  x
)  =  y ) )
3313, 32sylan 283 . . . . . . . . . . . . . . 15  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  x  e.  A )  ->  (
x H y  <->  ( H `  x )  =  y ) )
3433adantrr 483 . . . . . . . . . . . . . 14  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  (
x  e.  A  /\  D  e.  A )
)  ->  ( x H y  <->  ( H `  x )  =  y ) )
3530, 34anbi12d 477 . . . . . . . . . . . . 13  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  (
x  e.  A  /\  D  e.  A )
)  ->  ( (
x R D  /\  x H y )  <->  ( ( H `  x ) S ( H `  D )  /\  ( H `  x )  =  y ) ) )
36 ancom 266 . . . . . . . . . . . . . 14  |-  ( ( ( H `  x
) S ( H `
 D )  /\  ( H `  x )  =  y )  <->  ( ( H `  x )  =  y  /\  ( H `  x ) S ( H `  D ) ) )
37 breq1 4128 . . . . . . . . . . . . . . 15  |-  ( ( H `  x )  =  y  ->  (
( H `  x
) S ( H `
 D )  <->  y S
( H `  D
) ) )
3837pm5.32i 458 . . . . . . . . . . . . . 14  |-  ( ( ( H `  x
)  =  y  /\  ( H `  x ) S ( H `  D ) )  <->  ( ( H `  x )  =  y  /\  y S ( H `  D ) ) )
3936, 38bitri 184 . . . . . . . . . . . . 13  |-  ( ( ( H `  x
) S ( H `
 D )  /\  ( H `  x )  =  y )  <->  ( ( H `  x )  =  y  /\  y S ( H `  D ) ) )
4035, 39bitrdi 196 . . . . . . . . . . . 12  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  (
x  e.  A  /\  D  e.  A )
)  ->  ( (
x R D  /\  x H y )  <->  ( ( H `  x )  =  y  /\  y S ( H `  D ) ) ) )
4140exp32 365 . . . . . . . . . . 11  |-  ( H 
Isom  R ,  S  ( A ,  B )  ->  ( x  e.  A  ->  ( D  e.  A  ->  ( ( x R D  /\  x H y )  <->  ( ( H `  x )  =  y  /\  y S ( H `  D ) ) ) ) ) )
4241com23 78 . . . . . . . . . 10  |-  ( H 
Isom  R ,  S  ( A ,  B )  ->  ( D  e.  A  ->  ( x  e.  A  ->  ( ( x R D  /\  x H y )  <->  ( ( H `  x )  =  y  /\  y S ( H `  D ) ) ) ) ) )
4342imp 124 . . . . . . . . 9  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
x  e.  A  -> 
( ( x R D  /\  x H y )  <->  ( ( H `  x )  =  y  /\  y S ( H `  D ) ) ) ) )
4443pm5.32d 454 . . . . . . . 8  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
( x  e.  A  /\  ( x R D  /\  x H y ) )  <->  ( x  e.  A  /\  (
( H `  x
)  =  y  /\  y S ( H `  D ) ) ) ) )
4529, 44bitrd 188 . . . . . . 7  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
( x  e.  ( A  i^i  ( `' R " { D } ) )  /\  x H y )  <->  ( x  e.  A  /\  (
( H `  x
)  =  y  /\  y S ( H `  D ) ) ) ) )
4645rexbidv2 2553 . . . . . 6  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  ( E. x  e.  ( A  i^i  ( `' R " { D } ) ) x H y  <->  E. x  e.  A  ( ( H `  x )  =  y  /\  y S ( H `  D ) ) ) )
47 r19.41v 2707 . . . . . 6  |-  ( E. x  e.  A  ( ( H `  x
)  =  y  /\  y S ( H `  D ) )  <->  ( E. x  e.  A  ( H `  x )  =  y  /\  y S ( H `  D ) ) )
4846, 47bitrdi 196 . . . . 5  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  ( E. x  e.  ( A  i^i  ( `' R " { D } ) ) x H y  <-> 
( E. x  e.  A  ( H `  x )  =  y  /\  y S ( H `  D ) ) ) )
4920, 48bitr4d 191 . . . 4  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
( y  e.  B  /\  y  e.  ( `' S " { ( H `  D ) } ) )  <->  E. x  e.  ( A  i^i  ( `' R " { D } ) ) x H y ) )
502, 49bitrid 192 . . 3  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  (
y  e.  ( B  i^i  ( `' S " { ( H `  D ) } ) )  <->  E. x  e.  ( A  i^i  ( `' R " { D } ) ) x H y ) )
5150abbi2dv 2359 . 2  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  ( B  i^i  ( `' S " { ( H `  D ) } ) )  =  { y  |  E. x  e.  ( A  i^i  ( `' R " { D } ) ) x H y } )
521, 51eqtr4id 2290 1  |-  ( ( H  Isom  R ,  S  ( A ,  B )  /\  D  e.  A )  ->  ( H " ( A  i^i  ( `' R " { D } ) ) )  =  ( B  i^i  ( `' S " { ( H `  D ) } ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1402    e. wcel 2209   {cab 2224   E.wrex 2529   _Vcvv 2821    i^i cin 3219   {csn 3705   class class class wbr 4125   `'ccnv 4768   ran crn 4770   "cima 4772    Fn wfn 5367   -onto->wfo 5370   -1-1-onto->wf1o 5371   ` cfv 5372    Isom wiso 5373
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-isom 5381
This theorem is referenced by:  isoini2  6015  isoselem  6016
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