Theorem 3adantr2 1147

Description: Deduction adding a conjunct to antecedent. (Contributed by NM, 27-Apr-2005.)

Hypothesis

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

Assertion

Ref	Expression
3adantr2	|- ( ( ph /\ ( ps /\ ta /\ ch ) ) -> th )

Proof of Theorem 3adantr2

Step	Hyp	Ref	Expression
1		3simpb 985	. 2 |- ( ( ps /\ ta /\ ch ) -> ( ps /\ ch ) )
2		3adantr.1	. 2 |- ( ( ph /\ ( ps /\ ch ) ) -> th )
3	1, 2	sylan2 284	1 |- ( ( ph /\ ( ps /\ ta /\ ch ) ) -> th )

Syntax hints:   -> wi 4   /\ wa 103   /\ w3a 968

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107

This theorem depends on definitions:  df-bi 116  df-3an 970

This theorem is referenced by:  3adant3r2  1203  po3nr  4288  isosolem  5792  caovlem2d  6034