Theorem pm3.4 331

Description: Conjunction implies implication. Theorem *3.4 of [WhiteheadRussell] p. 113. (Contributed by NM, 31-Jul-1995.)

Assertion

Ref	Expression
pm3.4	|- ( ( ph /\ ps ) -> ( ph -> ps ) )

Proof of Theorem pm3.4

Step	Hyp	Ref	Expression
1		simpr 109	. 2 |- ( ( ph /\ ps ) -> ps )
2	1	a1d 22	1 |- ( ( ph /\ ps ) -> ( ph -> ps ) )

Syntax hints:   -> wi 4   /\ wa 103

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

This theorem is referenced by:  dcim  826  pclem6  1352  sbequ1  1741  sbequ8  1819  en2lp  4469