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Theorem imp5a 355
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
imp5a |- ( ph -> ( ps -> ( ch -> ( ( th /\ ta ) -> et ) ) ) )
Proof of Theorem imp5a
StepHypRef Expression
1 imp5.1 . 2 |- ( ph -> ( ps -> ( ch -> ( th -> ( ta -> et ) ) ) ) )
2 pm3.31 260 . 2 |- ( ( th -> ( ta -> et ) ) -> ( ( th /\ ta ) -> et ) )
31, 2syl8 71 1 |- ( ph -> ( ps -> ( ch -> ( ( th /\ ta ) -> et ) ) ) )
Colors of variables: wff set class
Syntax hints:   -> wi 4   /\ wa 103
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106
This theorem is referenced by: (None)
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