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Theorem nfa2 1558
Description: Lemma 24 of [Monk2] p. 114. (Contributed by Mario Carneiro, 24-Sep-2016.)
Assertion
Ref Expression
nfa2  |-  F/ x A. y A. x ph

Proof of Theorem nfa2
StepHypRef Expression
1 nfa1 1521 . 2  |-  F/ x A. x ph
21nfal 1555 1  |-  F/ x A. y A. x ph
Colors of variables: wff set class
Syntax hints:   A.wal 1329   F/wnf 1436
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1423  ax-7 1424  ax-gen 1425  ax-4 1487  ax-ial 1514
This theorem depends on definitions:  df-bi 116  df-nf 1437
This theorem is referenced by:  cbv1h  1723  csbie2t  3048  copsex2t  4167  fnoprabg  5872  strcollnft  13289
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