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Theorem fvresi 5879
Description: The value of a restricted identity function. (Contributed by NM, 19-May-2004.)
Assertion
Ref Expression
fvresi  |-  ( B  e.  A  ->  (
(  _I  |`  A ) `
 B )  =  B )

Proof of Theorem fvresi
StepHypRef Expression
1 fvres 5696 . 2  |-  ( B  e.  A  ->  (
(  _I  |`  A ) `
 B )  =  (  _I  `  B
) )
2 fvi 5736 . 2  |-  ( B  e.  A  ->  (  _I  `  B )  =  B )
31, 2eqtrd 2267 1  |-  ( B  e.  A  ->  (
(  _I  |`  A ) `
 B )  =  B )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1398    e. wcel 2205    _I cid 4411    |` cres 4753   ` cfv 5354
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-sbc 3045  df-un 3217  df-in 3219  df-ss 3226  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-br 4112  df-opab 4174  df-id 4416  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-res 4763  df-iota 5314  df-fun 5356  df-fv 5362
This theorem is referenced by:  f1ocnvfv1  5952  f1ocnvfv2  5953  fcof1  5958  fcofo  5959  isoid  5985  iordsmo  6530  omp1eomlem  7387  ctm  7402  ndxarg  13252  idmhm  13699  idghm  13993  dvid  15577  dvidre  15579
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