Theorem imp55 601

Description: An importation inference. (Contributed by Jeff Hankins, 7-Jul-2009.)

Hypothesis

Ref	Expression
imp5.1

Assertion

Ref	Expression
imp55

Proof of Theorem imp55

Step	Hyp	Ref	Expression
1		imp5.1	. . 3
2	1	imp4a 589	. 2
3	2	imp42 594	1

Syntax hints:  ->wi 4  /\wa 369

This theorem is referenced by:  alexsubALTlem4  20550

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 185  df-an 371