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Theorem nfa2 1777
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 1756 . 2  |-  F/ x A. x ph
21nfal 1766 1  |-  F/ x A. y A. x ph
Colors of variables: wff set class
Syntax hints:   A.wal 1527   F/wnf 1531
This theorem is referenced by:  mo  2165  csbie2t  3125  copsex2t  4253  fnoprabg  5945  pm14.123b  27626  hbexg  28322
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-6 1703  ax-7 1708  ax-11 1715
This theorem depends on definitions:  df-bi 177  df-nf 1532
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