Theorem anabsan 854

Description: Absorption of antecedent with conjunction. (Contributed by NM, 24-Mar-1996.)

Hypothesis

Ref	Expression
anabsan.1	|- ( ( ( ph /\ ph ) /\ ps ) -> ch )

Assertion

Ref	Expression
anabsan	|- ( ( ph /\ ps ) -> ch )

Proof of Theorem anabsan

Step	Hyp	Ref	Expression
1		pm4.24 675	. 2 |- ( ph <-> ( ph /\ ph ) )
2		anabsan.1	. 2 |- ( ( ( ph /\ ph ) /\ ps ) -> ch )
3	1, 2	sylanb 489	1 |- ( ( ph /\ ps ) -> ch )

Syntax hints:   -> wi 4   /\ wa 384

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 197  df-an 386

This theorem is referenced by:  anabss1  855  anabss5  857  anandis  873  iddvds  14995  1dvds  14996