Theorem nfa2 1526

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 1489	. 2 |- F/ x A. x ph
2	1	nfal 1523	1 |- F/ x A. y A. x ph

Syntax hints:   A.wal 1297   F/wnf 1404

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1391  ax-7 1392  ax-gen 1393  ax-4 1455  ax-ial 1482

This theorem depends on definitions:  df-bi 116  df-nf 1405

This theorem is referenced by:  cbv1h  1691  csbie2t  2998  copsex2t  4105  fnoprabg  5804  strcollnft  12767