Theorem nfeq1 2394

Description: Hypothesis builder for equality, special case. (Contributed by Mario Carneiro, 10-Oct-2016.)

Hypothesis

Ref	Expression
nfeq1.1	⊢ Ⅎ𝑥𝐴

Assertion

Ref	Expression
nfeq1	⊢ Ⅎ𝑥 𝐴 = 𝐵

Distinct variable group:   𝑥,𝐵

Allowed substitution hint:   𝐴(𝑥)

Proof of Theorem nfeq1

Step	Hyp	Ref	Expression
1		nfeq1.1	. 2 ⊢ Ⅎ𝑥𝐴
2		nfcv 2384	. 2 ⊢ Ⅎ𝑥𝐵
3	1, 2	nfeq 2392	1 ⊢ Ⅎ𝑥 𝐴 = 𝐵

Syntax hints:   = wceq 1398  Ⅎwnf 1509  Ⅎwnfc 2371

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 2214

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-cleq 2225  df-clel 2228  df-nfc 2373

This theorem is referenced by:  euabsn  3761  invdisjrab  4103  fvmptt  5769  eusvobj2  6036  ovmpodv2  6187  ovi3  6191  dom2lem  7011  seq3f1olemstep  10876  seq3f1olemp  10877  fsumf1o  12076  isumss  12077  isummulc2  12112  fsum00  12148  isumshft  12176  fprodf1o  12274  prodssdc  12275