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Theorem cnveqd 4904
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 4902 . 2 (𝐴 = 𝐵𝐴 = 𝐵)
31, 2syl 14 1 (𝜑𝐴 = 𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1395  ccnv 4722
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-in 3204  df-ss 3211  df-br 4087  df-opab 4149  df-cnv 4731
This theorem is referenced by:  cnvsng  5220  cores2  5247  suppssof1  6248  2ndval2  6314  2nd1st  6338  cnvf1olem  6384  brtpos2  6412  dftpos4  6424  tpostpos  6425  tposf12  6430  xpcomco  7005  infeq123d  7206  fsumcnv  11988  fprodcnv  12176  ennnfonelemf1  13029  strslfv3  13118  xpsval  13425  grpinvcnv  13641  grplactcnv  13675  eqglact  13802  isunitd  14110  znval  14640  znle2  14656  txswaphmeolem  15034
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