Theorem con3dimp 640

Description: Variant of con3d 636 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 636	. 2 |- ( ph -> ( -. ch -> -. ps ) )
3	2	imp 124	1 |- ( ( ph /\ -. ch ) -> -. ps )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-in1 619  ax-in2 620

This theorem is referenced by:  stoic1a  1471  nelneq  2332  nelneq2  2333  nelss  3288  eqsndc  7094  nnnninf  7324  bcpasc  11027  fiinfnf1o  11047  swrdccat  11315  nnoddn2prmb  12834  pcprod  12918  lgsdir  15763  2lgslem2  15820  2lgs  15832  pw1nct  16604