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Theorem nfim1 1533
Description: A closed form of nfim 1534. (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
StepHypRef Expression
1 nfim1.1 . . . 4  |-  F/ x ph
21nfri 1482 . . 3  |-  ( ph  ->  A. x ph )
3 nfim1.2 . . . 4  |-  ( ph  ->  F/ x ps )
43nfrd 1483 . . 3  |-  ( ph  ->  ( ps  ->  A. x ps ) )
52, 4hbim1 1532 . 2  |-  ( (
ph  ->  ps )  ->  A. x ( ph  ->  ps ) )
65nfi 1421 1  |-  F/ x
( ph  ->  ps )
Colors of variables: wff set class
Syntax hints:    -> wi 4   F/wnf 1419
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 1406  ax-gen 1408  ax-4 1470  ax-ial 1497  ax-i5r 1498
This theorem depends on definitions:  df-bi 116  df-nf 1420
This theorem is referenced by:  nfim  1534  cbv1  1705  hbsbd  1933
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