Theorem con3dimp 624

Description: Variant of con3d 620 with importation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.)

Hypothesis

Ref	Expression
con3dimp.1	|- ( ph -> ( ps -> ch ) )

Assertion

Ref	Expression
con3dimp	|- ( ( ph /\ -. ch ) -> -. ps )

Proof of Theorem con3dimp

Step	Hyp	Ref	Expression
1		con3dimp.1	. . 3 |- ( ph -> ( ps -> ch ) )
2	1	con3d 620	. 2 |- ( ph -> ( -. ch -> -. ps ) )
3	2	imp 123	1 |- ( ( ph /\ -. ch ) -> -. ps )

Syntax hints:   -. wn 3   -> 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  ax-in1 603  ax-in2 604

This theorem is referenced by:  nelneq  2240  nelneq2  2241  nelss  3158  nnnninf  7023  bcpasc  10512  fiinfnf1o  10532