Theorem anabsi7 587

Description: Absorption of antecedent into conjunction. (Contributed by NM, 20-Jul-1996.) (Proof shortened by Wolf Lammen, 18-Nov-2013.)

Hypothesis

Ref	Expression
anabsi7.1	|- ( ps -> ( ( ph /\ ps ) -> ch ) )

Assertion

Ref	Expression
anabsi7	|- ( ( ph /\ ps ) -> ch )

Proof of Theorem anabsi7

Step	Hyp	Ref	Expression
1		anabsi7.1	. . 3 |- ( ps -> ( ( ph /\ ps ) -> ch ) )
2	1	anabsi6 586	. 2 |- ( ( ps /\ ph ) -> ch )
3	2	ancoms 268	1 |- ( ( ph /\ ps ) -> ch )

This proof depends on syntax axioms:   -> wi 4   /\ wa 104

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This proof depends on definitions:  df-bi 117

This theorem is used by:  syldbl2  1333  syl2an23an  1340  nelrdva  3033  elunii  3940  ordelord  4526  onsucuni2  4711  funfveu  5708  fvelrn  5839  phplem3g  7157  prdisj  7859  gcdmultiplez  12798  dvdssq  12808