Theorem 3anim3i 1092

Description: Add two conjuncts to antecedent and consequent. (Contributed by Jeff Hankins, 19-Aug-2009.)

Hypothesis

Ref	Expression
3animi.1	|- ( ph -> ps )

Assertion

Ref	Expression
3anim3i	|- ( ( ch /\ th /\ ph ) -> ( ch /\ th /\ ps ) )

Proof of Theorem 3anim3i

Step	Hyp	Ref	Expression
1		id 19	. 2 |- ( ch -> ch )
2		id 19	. 2 |- ( th -> th )
3		3animi.1	. 2 |- ( ph -> ps )
4	1, 2, 3	3anim123i 1089	1 |- ( ( ch /\ th /\ ph ) -> ( ch /\ th /\ ps ) )

Syntax hints:   -> wi 4   /\ w3a 885

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

This theorem depends on definitions:  df-bi 110  df-3an 887

This theorem is referenced by:  syl3anl3  1185  syl3anr3  1189  elioo4g  8803