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Theorem nfa2 1875
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 1807 . 2  |-  F/ x A. x ph
21nfal 1865 1  |-  F/ x A. y A. x ph
Colors of variables: wff set class
Syntax hints:   A.wal 1550   F/wnf 1554
This theorem is referenced by:  cbv1h  1975  mo  2305  csbie2t  3297  copsex2t  4445  fnoprabg  6173  pm14.123b  27605  hbexg  28705
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1556  ax-5 1567  ax-17 1627  ax-9 1667  ax-8 1688  ax-6 1745  ax-7 1750  ax-11 1762
This theorem depends on definitions:  df-bi 179  df-ex 1552  df-nf 1555
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