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Theorem nfa2 2055
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 1999 . 2  |-  F/ x A. x ph
21nfal 2049 1  |-  F/ x A. y A. x ph
Colors of variables: wff setvar class
Syntax hints:   A.wal 1450   F/wnf 1675
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1677  ax-4 1690  ax-5 1766  ax-6 1813  ax-7 1859  ax-10 1932  ax-11 1937  ax-12 1950
This theorem depends on definitions:  df-bi 190  df-ex 1672  df-nf 1676
This theorem is referenced by:  cbv1h  2124  csbie2t  3378  copsex2t  4688  fnoprabg  6416  bj-hbext  31370  bj-nfext  31372  bj-cbv1hv  31397  ax11-pm  31500  pm14.123b  36847  hbexg  36993
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