Theorem 3impdir 1289

Description: Importation inference (undistribute conjunction). (Contributed by NM, 20-Aug-1995.)

Hypothesis

Ref	Expression
3impdir.1	|- ( ( ( ph /\ ps ) /\ ( ch /\ ps ) ) -> th )

Assertion

Ref	Expression
3impdir	|- ( ( ph /\ ch /\ ps ) -> th )

Proof of Theorem 3impdir

Step	Hyp	Ref	Expression
1		3impdir.1	. . 3 |- ( ( ( ph /\ ps ) /\ ( ch /\ ps ) ) -> th )
2	1	anandirs 588	. 2 |- ( ( ( ph /\ ch ) /\ ps ) -> th )
3	2	3impa 1189	1 |- ( ( ph /\ ch /\ ps ) -> th )

Syntax hints:   -> wi 4   /\ wa 103   /\ w3a 973

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107

This theorem depends on definitions:  df-bi 116  df-3an 975

This theorem is referenced by:  nnanq0  7420  divcanap7  8638