Theorem 3adant2l 1233

Description: Deduction adding a conjunct to antecedent. (Contributed by NM, 8-Jan-2006.)

Hypothesis

Ref	Expression
3adant1l.1	|- ( ( ph /\ ps /\ ch ) -> th )

Assertion

Ref	Expression
3adant2l	|- ( ( ph /\ ( ta /\ ps ) /\ ch ) -> th )

Proof of Theorem 3adant2l

Step	Hyp	Ref	Expression
1		3adant1l.1	. . . 4 |- ( ( ph /\ ps /\ ch ) -> th )
2	1	3com12 1208	. . 3 |- ( ( ps /\ ph /\ ch ) -> th )
3	2	3adant1l 1231	. 2 |- ( ( ( ta /\ ps ) /\ ph /\ ch ) -> th )
4	3	3com12 1208	1 |- ( ( ph /\ ( ta /\ ps ) /\ ch ) -> th )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 979

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 depends on definitions:  df-bi 117  df-3an 981

This theorem is referenced by:  sbthlemi4  6976  addassnqg  7398  mulassnqg  7400  prmuloc  7582  ltpopr  7611  addasssrg  7772  axaddass  7888