Theorem 19.33 1373

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

Step	Hyp	Ref	Expression
1		orc 633	. . 3 |- ( ph -> ( ph \/ ps ) )
2	1	alimi 1344	. 2 |- ( A. x ph -> A. x ( ph \/ ps ) )
3		olc 632	. . 3 |- ( ps -> ( ph \/ ps ) )
4	3	alimi 1344	. 2 |- ( A. x ps -> A. x ( ph \/ ps ) )
5	2, 4	jaoi 636	1 |- ( ( A. x ph \/ A. x ps ) -> A. x ( ph \/ ps ) )

Syntax hints:   -> wi 4   \/ wo 629   A.wal 1241

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-gen 1338

This theorem depends on definitions:  df-bi 110

This theorem is referenced by:  19.33b2  1520