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Theorem 19.23bi 1759
Description: Inference from Theorem 19.23 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.)
Hypothesis
Ref Expression
19.23bi.1 (xφψ)
Assertion
Ref Expression
19.23bi (φψ)

Proof of Theorem 19.23bi
StepHypRef Expression
1 19.8a 1756 . 2 (φxφ)
2 19.23bi.1 . 2 (xφψ)
31, 2syl 15 1 (φψ)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wex 1541
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-11 1746
This theorem depends on definitions:  df-bi 177  df-ex 1542
This theorem is referenced by:  2mo  2282  nfunv  5138
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