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Theorem nfeq2 2404
Description: Hypothesis builder for equality, special case. (Contributed by Mario Carneiro, 10-Oct-2016.)
Hypothesis
Ref Expression
nfeq2.1 Ⅎ𝑥𝐵
Assertion
Ref Expression
nfeq2 Ⅎ𝑥 𝐴 = 𝐵
Distinct variable group:   𝑥,𝐴
Allowed substitution hint:   𝐵(𝑥)

Proof of Theorem nfeq2
StepHypRef Expression
1 nfcv 2392 . 2 Ⅎ𝑥𝐴
2 nfeq2.1 . 2 Ⅎ𝑥𝐵
31, 2nfeq 2400 1 Ⅎ𝑥 𝐴 = 𝐵
Colors of variables:    wff set class
This proof depends on syntax axioms:   = wceq 1402  Ⅎwnf 1513  Ⅎwnfc 2379
This proof depends on 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 proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-cleq 2231  df-clel 2234  df-nfc 2381
This theorem is used by:  issetf  2829  eqvincf  2951  csbhypf  3186  nfpr  3759  intab  3999  nfmpt  4225  cbvmptf  4227  cbvmpt  4228  repizf2  4301  moop2  4394  eusvnf  4601  elrnmpt1  5035  iotaexab  5359  fmptco  5877  dfimafnf  5958  elabrex  5966  elabrexg  5967  nfmpo  6160  cbvmpox  6169  ovmpodxf  6217  fmpox  6440  f1od2  6475  nfrecs  6582  erovlem  6905  xpf1o  7148  mapxpen  7152  mkvprop  7504  cc3  7640  lble  9285  hashf1lem2  11308  nfsum1  12147  nfsum  12148  zsumdc  12176  fsum3  12179  fsum3cvg2  12186  fsum2dlemstep  12226  mertenslem2  12328  nfcprod1  12346  nfcprod  12347  zproddc  12371  fprod2dlemstep  12414  ctiunctlemfo  13388  ellimc3apf  15886
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