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Theorem 19.35i 1593
Description: Inference from Theorem 19.35 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.)
Hypothesis
Ref Expression
19.35i.1  |-  E. x
( ph  ->  ps )
Assertion
Ref Expression
19.35i  |-  ( A. x ph  ->  E. x ps )

Proof of Theorem 19.35i
StepHypRef Expression
1 19.35i.1 . 2  |-  E. x
( ph  ->  ps )
2 19.35 1592 . 2  |-  ( E. x ( ph  ->  ps )  <->  ( A. x ph  ->  E. x ps )
)
31, 2mpbi 201 1  |-  ( A. x ph  ->  E. x ps )
Colors of variables: wff set class
Syntax hints:    -> wi 6   A.wal 1532   E.wex 1533
This theorem is referenced by:  axrep4  4136  zfcndrep  8231
This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10  ax-gen 1538  ax-5 1549
This theorem depends on definitions:  df-bi 179  df-an 362  df-ex 1534
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