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Theorem nfeq2 2387
Description: Hypothesis builder for equality, special case. (Contributed by Mario Carneiro, 10-Oct-2016.)
Hypothesis
Ref Expression
nfeq2.1 𝑥𝐵
Assertion
Ref Expression
nfeq2 𝑥 𝐴 = 𝐵
Distinct variable group:   𝑥,𝐴
Allowed substitution hint:   𝐵(𝑥)

Proof of Theorem nfeq2
StepHypRef Expression
1 nfcv 2375 . 2 𝑥𝐴
2 nfeq2.1 . 2 𝑥𝐵
31, 2nfeq 2383 1 𝑥 𝐴 = 𝐵
Colors of variables: wff set class
Syntax hints:   = wceq 1398  wnf 1509  wnfc 2362
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 2213
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1811  df-cleq 2224  df-clel 2227  df-nfc 2364
This theorem is referenced by:  issetf  2811  eqvincf  2932  csbhypf  3167  nfpr  3723  intab  3962  nfmpt  4186  cbvmptf  4188  cbvmpt  4189  repizf2  4258  moop2  4350  eusvnf  4556  elrnmpt1  4989  iotaexab  5312  fmptco  5821  elabrex  5908  elabrexg  5909  nfmpo  6100  cbvmpox  6109  ovmpodxf  6157  fmpox  6374  f1od2  6409  nfrecs  6516  erovlem  6839  xpf1o  7073  mapxpen  7077  mkvprop  7400  cc3  7530  lble  9169  nfsum1  11979  nfsum  11980  zsumdc  12008  fsum3  12011  fsum3cvg2  12018  fsum2dlemstep  12058  mertenslem2  12160  nfcprod1  12178  nfcprod  12179  zproddc  12203  fprod2dlemstep  12246  ctiunctlemfo  13123  ellimc3apf  15454
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