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Theorem a17d 1420
Description: ax-17 1419 with antecedent. (Contributed by NM, 1-Mar-2013.)
Assertion
Ref Expression
a17d  |-  ( ph  ->  ( ps  ->  A. x ps ) )
Distinct variable group:    ps, x
Allowed substitution hint:    ph( x)

Proof of Theorem a17d
StepHypRef Expression
1 ax-17 1419 . 2  |-  ( ps 
->  A. x ps )
21a1i 9 1  |-  ( ph  ->  ( ps  ->  A. x ps ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4   A.wal 1241
This theorem was proved from axioms:  ax-1 5  ax-mp 7  ax-17 1419
This theorem is referenced by: (None)
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