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Theorem alim 1391
Description: Theorem 19.20 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.) (Proof shortened by O'Cat, 30-Mar-2008.)
Assertion
Ref Expression
alim  |-  ( A. x ( ph  ->  ps )  ->  ( A. x ph  ->  A. x ps ) )

Proof of Theorem alim
StepHypRef Expression
1 ax-5 1381 1  |-  ( A. x ( ph  ->  ps )  ->  ( A. x ph  ->  A. x ps ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4   A.wal 1287
This theorem was proved from axioms:  ax-5 1381
This theorem is referenced by:  al2imi  1392  19.21h  1494  nfalt  1515  19.21ht  1518  mor  1990  bj-hbalt  11619
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