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Theorem elpreima 5338
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 4738 . . . . 5  |-  ( `' F " C ) 
C_  dom  F
21sseli 3004 . . . 4  |-  ( B  e.  ( `' F " C )  ->  B  e.  dom  F )
3 fndm 5049 . . . . 5  |-  ( F  Fn  A  ->  dom  F  =  A )
43eleq2d 2152 . . . 4  |-  ( F  Fn  A  ->  ( B  e.  dom  F  <->  B  e.  A ) )
52, 4syl5ib 152 . . 3  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  ->  B  e.  A )
)
6 fnfun 5047 . . . . 5  |-  ( F  Fn  A  ->  Fun  F )
7 fvimacnvi 5333 . . . . 5  |-  ( ( Fun  F  /\  B  e.  ( `' F " C ) )  -> 
( F `  B
)  e.  C )
86, 7sylan 277 . . . 4  |-  ( ( F  Fn  A  /\  B  e.  ( `' F " C ) )  ->  ( F `  B )  e.  C
)
98ex 113 . . 3  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  -> 
( F `  B
)  e.  C ) )
105, 9jcad 301 . 2  |-  ( F  Fn  A  ->  ( B  e.  ( `' F " C )  -> 
( B  e.  A  /\  ( F `  B
)  e.  C ) ) )
11 fvimacnv 5334 . . . . 5  |-  ( ( Fun  F  /\  B  e.  dom  F )  -> 
( ( F `  B )  e.  C  <->  B  e.  ( `' F " C ) ) )
1211funfni 5050 . . . 4  |-  ( ( F  Fn  A  /\  B  e.  A )  ->  ( ( F `  B )  e.  C  <->  B  e.  ( `' F " C ) ) )
1312biimpd 142 . . 3  |-  ( ( F  Fn  A  /\  B  e.  A )  ->  ( ( F `  B )  e.  C  ->  B  e.  ( `' F " C ) ) )
1413expimpd 355 . 2  |-  ( F  Fn  A  ->  (
( B  e.  A  /\  ( F `  B
)  e.  C )  ->  B  e.  ( `' F " C ) ) )
1510, 14impbid 127 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 102    <-> wb 103    e. wcel 1434   `'ccnv 4390   dom cdm 4391   "cima 4394   Fun wfun 4946    Fn wfn 4947   ` cfv 4952
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-14 1446  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2065  ax-sep 3916  ax-pow 3968  ax-pr 3992
This theorem depends on definitions:  df-bi 115  df-3an 922  df-tru 1288  df-nf 1391  df-sb 1688  df-eu 1946  df-mo 1947  df-clab 2070  df-cleq 2076  df-clel 2079  df-nfc 2212  df-ral 2358  df-rex 2359  df-v 2612  df-sbc 2825  df-un 2986  df-in 2988  df-ss 2995  df-pw 3402  df-sn 3422  df-pr 3423  df-op 3425  df-uni 3622  df-br 3806  df-opab 3860  df-id 4076  df-xp 4397  df-rel 4398  df-cnv 4399  df-co 4400  df-dm 4401  df-rn 4402  df-res 4403  df-ima 4404  df-iota 4917  df-fun 4954  df-fn 4955  df-fv 4960
This theorem is referenced by:  fniniseg  5339  fncnvima2  5340  rexsupp  5343  unpreima  5344  respreima  5347
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