Theorem pm3.41 331

Description: Theorem *3.41 of [WhiteheadRussell] p. 113. (Contributed by NM, 3-Jan-2005.)

Assertion

Ref	Expression
pm3.41	|- ( ( ph -> ch ) -> ( ( ph /\ ps ) -> ch ) )

Proof of Theorem pm3.41

Step	Hyp	Ref	Expression
1		simpl 109	. 2 |- ( ( ph /\ ps ) -> ph )
2	1	imim1i 60	1 |- ( ( ph -> ch ) -> ( ( ph /\ ps ) -> ch ) )

Syntax hints:   -> wi 4   /\ wa 104

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

This theorem is referenced by: (None)