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Theorem 19.35i 1559
Description: Inference from Theorem 19.35 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.) (Revised by NM, 2-Feb-2015.)
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 19.35-1 1558 . 2  |-  ( E. x ( ph  ->  ps )  ->  ( A. x ph  ->  E. x ps ) )
31, 2ax-mp 7 1  |-  ( A. x ph  ->  E. x ps )
Colors of variables: wff set class
Syntax hints:    -> wi 4   A.wal 1285   E.wex 1424
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1379  ax-gen 1381  ax-ie1 1425  ax-ie2 1426  ax-4 1443  ax-ial 1470
This theorem depends on definitions:  df-bi 115
This theorem is referenced by:  19.36i  1605  spimed  1672
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