Theorem nfim1 1559

Description: A closed form of nfim 1560. (Contributed by NM, 5-Aug-1993.) (Revised by Mario Carneiro, 24-Sep-2016.) (Proof shortened by Wolf Lammen, 2-Jan-2018.)

Hypotheses

Ref	Expression
nfim1.1	|- F/ x ph
nfim1.2	|- ( ph -> F/ x ps )

Assertion

Ref	Expression
nfim1	|- F/ x ( ph -> ps )

Proof of Theorem nfim1

Step	Hyp	Ref	Expression
1		nfim1.1	. . . 4 |- F/ x ph
2	1	nfri 1507	. . 3 |- ( ph -> A. x ph )
3		nfim1.2	. . . 4 |- ( ph -> F/ x ps )
4	3	nfrd 1508	. . 3 |- ( ph -> ( ps -> A. x ps ) )
5	2, 4	hbim1 1558	. 2 |- ( ( ph -> ps ) -> A. x ( ph -> ps ) )
6	5	nfi 1450	1 |- F/ x ( ph -> ps )

Syntax hints:   -> wi 4   F/wnf 1448

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 1435  ax-gen 1437  ax-4 1498  ax-ial 1522  ax-i5r 1523

This theorem depends on definitions:  df-bi 116  df-nf 1449

This theorem is referenced by:  nfim  1560  cbv1  1733  cbv1v  1735  hbsbd  1970  nfabdw  2327