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Theorem 19.3h 1442
Description: A wff may be quantified with a variable not free in it. Theorem 19.3 of [Margaris] p. 89. (Contributed by NM, 5-Aug-1993.) (Revised by NM, 21-May-2007.)
Hypothesis
Ref Expression
19.3h.1
Assertion
Ref Expression
19.3h

Proof of Theorem 19.3h
StepHypRef Expression
1 ax-4 1397 . 2
2 19.3h.1 . 2
31, 2impbii 117 1
Colors of variables: wff set class
Syntax hints:   wi 4   wb 98  wal 1240
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia2 100  ax-ia3 101  ax-4 1397
This theorem depends on definitions:  df-bi 110
This theorem is referenced by:  19.27h  1449  19.28h  1451  equsalh  1611  2eu4  1990
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