Theorem nfa2 1632

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

Step	Hyp	Ref	Expression
1		nfa1 1594	. 2 |- F/ x A. x ph
2	1	nfal 1629	1 |- F/ x A. y A. x ph

This proof depends on syntax axioms:   A.wal 1400   F/wnf 1513

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ial 1587

This proof depends on definitions:  df-bi 117  df-nf 1514

This theorem is used by:  cbv1h  1799  csbie2t  3196  copsex2t  4385  fnoprabg  6189