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Theorem cnveqd 4933
Description: Equality deduction for converse. (Contributed by NM, 6-Dec-2013.)
Hypothesis
Ref Expression
cnveqd.1 (𝜑𝐴 = 𝐵)
Assertion
Ref Expression
cnveqd (𝜑𝐴 = 𝐵)

Proof of Theorem cnveqd
StepHypRef Expression
1 cnveqd.1 . 2 (𝜑𝐴 = 𝐵)
2 cnveq 4931 . 2 (𝐴 = 𝐵𝐴 = 𝐵)
31, 2syl 14 1 (𝜑𝐴 = 𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1398  ccnv 4750
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-ext 2216
This theorem depends on definitions:  df-bi 117  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-in 3219  df-ss 3226  df-br 4112  df-opab 4174  df-cnv 4759
This theorem is referenced by:  cnvsng  5250  cores2  5277  suppssof1  6286  2ndval2  6352  2nd1st  6376  cnvf1olem  6422  brtpos2  6484  dftpos4  6496  tpostpos  6497  tposf12  6502  xpcomco  7079  infeq123d  7309  fsumcnv  12127  fprodcnv  12315  ennnfonelemf1  13186  strslfv3  13275  xpsval  13582  grpinvcnv  13798  grplactcnv  13832  eqglact  13959  isunitd  14268  znval  14801  znle2  14817  txswaphmeolem  15202
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