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Theorem nfa1-o 35058
Description:  x is not free in  A. x ph. (Contributed by Mario Carneiro, 11-Aug-2016.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
nfa1-o  |-  F/ x A. x ph

Proof of Theorem nfa1-o
StepHypRef Expression
1 hba1-o 35041 . 2  |-  ( A. x ph  ->  A. x A. x ph )
21nfi 1631 1  |-  F/ x A. x ph
Colors of variables: wff setvar class
Syntax hints:   A.wal 1397   F/wnf 1624
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1626  ax-4 1639  ax-c5 35027  ax-c4 35028  ax-c7 35029
This theorem depends on definitions:  df-bi 185  df-nf 1625
This theorem is referenced by:  axc11n-16  35081  ax12eq  35084  ax12el  35085  ax12v2-o  35092
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