Theorem alim 1437

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

Step	Hyp	Ref	Expression
1		ax-5 1427	1 |- ( A. x ( ph -> ps ) -> ( A. x ph -> A. x ps ) )

Syntax hints:   -> wi 4   A.wal 1333

This theorem was proved from axioms:  ax-5 1427

This theorem is referenced by:  al2imi  1438  19.21h  1537  nfalt  1558  19.21ht  1561  mor  2048  bj-stal  13293  bj-hbalt  13308