Theorem cnveqi 4854

Description: Equality inference for converse. (Contributed by NM, 23-Dec-2008.)

Hypothesis

Ref	Expression
cnveqi.1	⊢ 𝐴 = 𝐵

Assertion

Ref	Expression
cnveqi	⊢ ◡𝐴 = ◡𝐵

Proof of Theorem cnveqi

Step	Hyp	Ref	Expression
1		cnveqi.1	. 2 ⊢ 𝐴 = 𝐵
2		cnveq 4853	. 2 ⊢ (𝐴 = 𝐵 → ◡𝐴 = ◡𝐵)
3	1, 2	ax-mp 5	1 ⊢ ◡𝐴 = ◡𝐵

Syntax hints:   = wceq 1373  ^◡ccnv 4675

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 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-ext 2187

This theorem depends on definitions:  df-bi 117  df-nf 1484  df-sb 1786  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-in 3172  df-ss 3179  df-br 4046  df-opab 4107  df-cnv 4684

This theorem is referenced by:  mptcnv  5086  cnvxp  5102  xp0  5103  imainrect  5129  cnvcnv  5136  mptpreima  5177  co01  5198  coi2  5200  cocnvres  5208  fcoi1  5458  fun11iun  5545  f1ocnvd  6150  cnvoprab  6322  f1od2  6323  mapsncnv  6784  sbthlemi8  7068  caseinj  7193  djuinj  7210  fisumcom2  11782  fprodcom2fi  11970