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Theorem cnvresid 5432
Description: Converse of a restricted identity function. (Contributed by FL, 4-Mar-2007.)
Assertion
Ref Expression
cnvresid ( I ↾ 𝐴) = ( I ↾ 𝐴)

Proof of Theorem cnvresid
StepHypRef Expression
1 cnvi 5169 . . 3 I = I
21eqcomi 2238 . 2 I = I
3 funi 5386 . . 3 Fun I
4 funeq 5374 . . 3 ( I = I → (Fun I ↔ Fun I ))
53, 4mpbii 148 . 2 ( I = I → Fun I )
6 funcnvres 5431 . . 3 (Fun I → ( I ↾ 𝐴) = ( I ↾ ( I “ 𝐴)))
7 imai 5120 . . . 4 ( I “ 𝐴) = 𝐴
81, 7reseq12i 5038 . . 3 ( I ↾ ( I “ 𝐴)) = ( I ↾ 𝐴)
96, 8eqtrdi 2283 . 2 (Fun I → ( I ↾ 𝐴) = ( I ↾ 𝐴))
102, 5, 9mp2b 8 1 ( I ↾ 𝐴) = ( I ↾ 𝐴)
Colors of variables: wff set class
Syntax hints:   = wceq 1398   I cid 4411  ccnv 4750  cres 4753  cima 4754  Fun wfun 5348
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-un 3217  df-in 3219  df-ss 3226  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  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-rn 4762  df-res 4763  df-ima 4764  df-fun 5356
This theorem is referenced by:  fcoi1  5549  f1oi  5656  xnn0nnen  10803  ssidcn  15092  idhmeo  15199
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