Theorem adantlrl 482

Description: Deduction adding a conjunct to antecedent. (Contributed by NM, 26-Dec-2004.) (Proof shortened by Wolf Lammen, 4-Dec-2012.)

Hypothesis

Ref	Expression
adantl2.1	|- ( ( ( ph /\ ps ) /\ ch ) -> th )

Assertion

Ref	Expression
adantlrl	|- ( ( ( ph /\ ( ta /\ ps ) ) /\ ch ) -> th )

Proof of Theorem adantlrl

Step	Hyp	Ref	Expression
1		simpr 110	. 2 |- ( ( ta /\ ps ) -> ps )
2		adantl2.1	. 2 |- ( ( ( ph /\ ps ) /\ ch ) -> th )
3	1, 2	sylanl2 403	1 |- ( ( ( ph /\ ( ta /\ ps ) ) /\ ch ) -> th )

Syntax hints:   -> wi 4   /\ wa 104

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem is referenced by:  mapxpen  6909  recexgt0sr  7840  fsumabs  11630  fsumiun  11642