Theorem cnveq 4949

Description: Equality theorem for converse. (Contributed by NM, 13-Aug-1995.)

Assertion

Ref	Expression
cnveq	|- ( A = B -> `' A = `' B )

Proof of Theorem cnveq

Step	Hyp	Ref	Expression
1		cnvss 4948	. . 3 |- ( A C_ B -> `' A C_ `' B )
2		cnvss 4948	. . 3 |- ( B C_ A -> `' B C_ `' A )
3	1, 2	anim12i 338	. 2 |- ( ( A C_ B /\ B C_ A ) -> ( `' A C_ `' B /\ `' B C_ `' A ) )
4		eqss 3263	. 2 |- ( A = B <-> ( A C_ B /\ B C_ A ) )
5		eqss 3263	. 2 |- ( `' A = `' B <-> ( `' A C_ `' B /\ `' B C_ `' A ) )
6	3, 4, 5	3imtr4i 201	1 |- ( A = B -> `' A = `' B )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1402   C_ wss 3220   `'ccnv 4768

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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220

This theorem depends on definitions:  df-bi 117  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-in 3226  df-ss 3233  df-br 4126  df-opab 4188  df-cnv 4777

This theorem is referenced by:  cnveqi  4950  cnveqd  4951  rneq  5004  cnveqb  5238  funcnvuni  5445  f1eq1  5588  f1ssf1  5666  f1o00  5671  foeqcnvco  5986  tposfn2  6527  ereq1  6804  infeq3  7345  1arith  13124  isrim0  14441  psrbag  14976  psr1clfi  15002  iscn  15221  ishmeo  15328  istrl  16540