Theorem 3adant1l 1232

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
3adant1l	|- ( ( ( ta /\ ph ) /\ ps /\ ch ) -> th )

Proof of Theorem 3adant1l

Step	Hyp	Ref	Expression
1		3adant1l.1	. . . 4 |- ( ( ph /\ ps /\ ch ) -> th )
2	1	3expb 1206	. . 3 |- ( ( ph /\ ( ps /\ ch ) ) -> th )
3	2	adantll 476	. 2 |- ( ( ( ta /\ ph ) /\ ( ps /\ ch ) ) -> th )
4	3	3impb 1201	1 |- ( ( ( ta /\ ph ) /\ ps /\ ch ) -> th )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 980

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 982

This theorem is referenced by:  3adant2l  1234  3adant3l  1236  ad5ant245  1238  tfrcl  6422  addassnqg  7449  mulassnqg  7451  addasssrg  7823  axaddass  7939  issubmnd  13083  opprringbg  13636