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Theorem elpreima 5630
Description: Membership in the preimage of a set under a function. (Contributed by Jeff Madsen, 2-Sep-2009.)
Assertion
Ref Expression
elpreima  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  <->  ( B  e.  A  /\  ( F `  B )  e.  C ) ) )

Proof of Theorem elpreima
StepHypRef Expression
1 cnvimass 4986 . . . . 5  |-  ( `' F " C ) 
C_  dom  F
21sseli 3151 . . . 4  |-  ( B  e.  ( `' F " C )  ->  B  e.  dom  F )
3 fndm 5310 . . . . 5  |-  ( F  Fn  A  ->  dom  F  =  A )
43eleq2d 2247 . . . 4  |-  ( F  Fn  A  ->  ( B  e.  dom  F  <->  B  e.  A ) )
52, 4syl5ib 154 . . 3  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  ->  B  e.  A )
)
6 fnfun 5308 . . . . 5  |-  ( F  Fn  A  ->  Fun  F )
7 fvimacnvi 5625 . . . . 5  |-  ( ( Fun  F  /\  B  e.  ( `' F " C ) )  -> 
( F `  B
)  e.  C )
86, 7sylan 283 . . . 4  |-  ( ( F  Fn  A  /\  B  e.  ( `' F " C ) )  ->  ( F `  B )  e.  C
)
98ex 115 . . 3  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  -> 
( F `  B
)  e.  C ) )
105, 9jcad 307 . 2  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  -> 
( B  e.  A  /\  ( F `  B
)  e.  C ) ) )
11 fvimacnv 5626 . . . . 5  |-  ( ( Fun  F  /\  B  e.  dom  F )  -> 
( ( F `  B )  e.  C  <->  B  e.  ( `' F " C ) ) )
1211funfni 5311 . . . 4  |-  ( ( F  Fn  A  /\  B  e.  A )  ->  ( ( F `  B )  e.  C  <->  B  e.  ( `' F " C ) ) )
1312biimpd 144 . . 3  |-  ( ( F  Fn  A  /\  B  e.  A )  ->  ( ( F `  B )  e.  C  ->  B  e.  ( `' F " C ) ) )
1413expimpd 363 . 2  |-  ( F  Fn  A  ->  (
( B  e.  A  /\  ( F `  B
)  e.  C )  ->  B  e.  ( `' F " C ) ) )
1510, 14impbid 129 1  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  <->  ( B  e.  A  /\  ( F `  B )  e.  C ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    e. wcel 2148   `'ccnv 4621   dom cdm 4622   "cima 4625   Fun wfun 5205    Fn wfn 5206   ` cfv 5211
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-sep 4118  ax-pow 4171  ax-pr 4205
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2739  df-sbc 2963  df-un 3133  df-in 3135  df-ss 3142  df-pw 3576  df-sn 3597  df-pr 3598  df-op 3600  df-uni 3808  df-br 4001  df-opab 4062  df-id 4289  df-xp 4628  df-rel 4629  df-cnv 4630  df-co 4631  df-dm 4632  df-rn 4633  df-res 4634  df-ima 4635  df-iota 5173  df-fun 5213  df-fn 5214  df-fv 5219
This theorem is referenced by:  fniniseg  5631  fncnvima2  5632  rexsupp  5635  unpreima  5636  respreima  5639  fisumss  11371  fprodssdc  11569  tanvalap  11687  1arith  12335  cncnpi  13361  cncnp  13363  cnpdis  13375  tx1cn  13402  tx2cn  13403  txcnmpt  13406  txdis1cn  13411  xmeterval  13568  cnbl0  13667  cnblcld  13668
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