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

Step	Hyp	Ref	Expression
1		cnvi 5169	. . 3 |- `' _I = _I
2	1	eqcomi 2238	. 2 |- _I = `' _I
3		funi 5386	. . 3 |- Fun _I
4		funeq 5374	. . 3 |- ( _I = `' _I -> ( Fun _I <-> Fun `' _I ) )
5	3, 4	mpbii 148	. 2 |- ( _I = `' _I -> Fun `' _I )
6		funcnvres 5431	. . 3 |- ( Fun `' _I -> `' ( _I |` A ) = ( `' _I |` ( _I " A ) ) )
7		imai 5120	. . . 4 |- ( _I " A ) = A
8	1, 7	reseq12i 5038	. . 3 |- ( `' _I |` ( _I " A ) ) = ( _I |` A )
9	6, 8	eqtrdi 2283	. 2 |- ( Fun `' _I -> `' ( _I |` A ) = ( _I |` A ) )
10	2, 5, 9	mp2b 8	1 |- `' ( _I |` A ) = ( _I |` A )

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