Theorem imp4d 592

Description: An importation inference. (Contributed by NM, 26-Apr-1994.)

Hypothesis

Ref	Expression
imp4.1

Assertion

Ref	Expression
imp4d

Proof of Theorem imp4d

Step	Hyp	Ref	Expression
1		imp4.1	. . 3
2	1	imp4a 589	. 2
3	2	impd 431	1

Syntax hints:  ->wi 4  /\wa 369

This theorem is referenced by:  imp45  597  tfrlem9  7073  uzind  10979  facdiv  12365  cvrexchlem  35143

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