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Theorem nfa2 1579
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 1541 . 2  |-  F/ x A. x ph
21nfal 1576 1  |-  F/ x A. y A. x ph
Colors of variables: wff set class
Syntax hints:   A.wal 1351   F/wnf 1460
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-5 1447  ax-7 1448  ax-gen 1449  ax-ial 1534
This theorem depends on definitions:  df-bi 117  df-nf 1461
This theorem is referenced by:  cbv1h  1746  csbie2t  3105  copsex2t  4242  fnoprabg  5970
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