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Theorem cnveqd 4906
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 4904 . 2 (𝐴 = 𝐵𝐴 = 𝐵)
31, 2syl 14 1 (𝜑𝐴 = 𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1397  ccnv 4724
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-in 3206  df-ss 3213  df-br 4089  df-opab 4151  df-cnv 4733
This theorem is referenced by:  cnvsng  5222  cores2  5249  suppssof1  6256  2ndval2  6322  2nd1st  6346  cnvf1olem  6392  brtpos2  6420  dftpos4  6432  tpostpos  6433  tposf12  6438  xpcomco  7013  infeq123d  7218  fsumcnv  12019  fprodcnv  12207  ennnfonelemf1  13060  strslfv3  13149  xpsval  13456  grpinvcnv  13672  grplactcnv  13706  eqglact  13833  isunitd  14142  znval  14672  znle2  14688  txswaphmeolem  15071
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