Theorem con3dimp 638

Description: Variant of con3d 634 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 634	. 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 617  ax-in2 618

This theorem is referenced by:  stoic1a  1469  nelneq  2330  nelneq2  2331  nelss  3285  nnnninf  7289  bcpasc  10983  fiinfnf1o  11003  swrdccat  11262  nnoddn2prmb  12780  pcprod  12864  lgsdir  15708  2lgslem2  15765  2lgs  15777  pw1nct  16328