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Theorem nfa2 1543
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 1506 . 2  |-  F/ x A. x ph
21nfal 1540 1  |-  F/ x A. y A. x ph
Colors of variables: wff set class
Syntax hints:   A.wal 1314   F/wnf 1421
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 1408  ax-7 1409  ax-gen 1410  ax-4 1472  ax-ial 1499
This theorem depends on definitions:  df-bi 116  df-nf 1422
This theorem is referenced by:  cbv1h  1708  csbie2t  3018  copsex2t  4137  fnoprabg  5840  strcollnft  13109
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