Theorem imp5d 341

Description: An importation inference. (Contributed by Jeff Hankins, 7-Jul-2009.)

Hypothesis

Ref	Expression
imp5.1	|- ( ph -> ( ps -> ( ch -> ( th -> ( ta -> et ) ) ) ) )

Assertion

Ref	Expression
imp5d	|- ( ( ( ph /\ ps ) /\ ch ) -> ( ( th /\ ta ) -> et ) )

Proof of Theorem imp5d

Step	Hyp	Ref	Expression
1		imp5.1	. . 3 |- ( ph -> ( ps -> ( ch -> ( th -> ( ta -> et ) ) ) ) )
2	1	imp31 243	. 2 |- ( ( ( ph /\ ps ) /\ ch ) -> ( th -> ( ta -> et ) ) )
3	2	impd 242	1 |- ( ( ( ph /\ ps ) /\ ch ) -> ( ( th /\ ta ) -> et ) )

Syntax hints:   -> wi 4   /\ wa 97

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

This theorem is referenced by: (None)