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Theorem 19.33 1618
Description: Theorem 19.33 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.)
Assertion
Ref Expression
19.33  |-  ( ( A. x ph  \/  A. x ps )  ->  A. x ( ph  \/  ps ) )

Proof of Theorem 19.33
StepHypRef Expression
1 orc 376 . . 3  |-  ( ph  ->  ( ph  \/  ps ) )
21alimi 1569 . 2  |-  ( A. x ph  ->  A. x
( ph  \/  ps ) )
3 olc 375 . . 3  |-  ( ps 
->  ( ph  \/  ps ) )
43alimi 1569 . 2  |-  ( A. x ps  ->  A. x
( ph  \/  ps ) )
52, 4jaoi 370 1  |-  ( ( A. x ph  \/  A. x ps )  ->  A. x ( ph  \/  ps ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    \/ wo 359   A.wal 1550
This theorem is referenced by:  19.33b  1619
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1556  ax-5 1567
This theorem depends on definitions:  df-bi 179  df-or 361
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