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Theorem 19.23bi 1776
Description: Inference from Theorem 19.23 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.)
Hypothesis
Ref Expression
19.23bi.1  |-  ( E. x ph  ->  ps )
Assertion
Ref Expression
19.23bi  |-  ( ph  ->  ps )

Proof of Theorem 19.23bi
StepHypRef Expression
1 19.8a 1763 . 2  |-  ( ph  ->  E. x ph )
2 19.23bi.1 . 2  |-  ( E. x ph  ->  ps )
31, 2syl 16 1  |-  ( ph  ->  ps )
Colors of variables: wff set class
Syntax hints:    -> wi 4   E.wex 1551
This theorem is referenced by:  equs5e  1911  2mo  2361  copsexg  4445  axreg2  7564  ustuqtop4  18279
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1556  ax-5 1567  ax-17 1627  ax-9 1667  ax-8 1688  ax-11 1762
This theorem depends on definitions:  df-bi 179  df-ex 1552
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