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Theorem 19.23bi 1819
Description: Inference from Theorem 19.23 of [Margaris] p. 90. (Contributed by NM, 12-Mar-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 1806 . 2  |-  ( ph  ->  E. x ph )
2 19.23bi.1 . 2  |-  ( E. x ph  ->  ps )
31, 2syl 16 1  |-  ( ph  ->  ps )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4   E.wex 1596
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1601  ax-4 1612  ax-5 1680  ax-6 1719  ax-7 1739  ax-12 1803
This theorem depends on definitions:  df-bi 185  df-ex 1597
This theorem is referenced by:  equs5e  1928  mo2v  2282  2mo  2382  2moOLD  2383  2moOLDOLD  2384  copsexg  4732  copsexgOLD  4733  axreg2  8015  hash1to3  12492  ustuqtop4  20482
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