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Theorem nfa2 1779
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 1758 . 2  |-  F/ x A. x ph
21nfal 1768 1  |-  F/ x A. y A. x ph
Colors of variables: wff set class
Syntax hints:   A.wal 1529   F/wnf 1533
This theorem is referenced by:  mo  2167  csbie2t  3127  copsex2t  4255  fnoprabg  5947  pm14.123b  27637  hbexg  28378
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1535  ax-5 1546  ax-17 1605  ax-9 1637  ax-8 1645  ax-6 1705  ax-7 1710  ax-11 1717
This theorem depends on definitions:  df-bi 177  df-nf 1534
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