Theorem imp4c 591

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

Hypothesis

Ref	Expression
imp4.1

Assertion

Ref	Expression
imp4c

Proof of Theorem imp4c

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

Syntax hints:  ->wi 4  /\wa 369

This theorem is referenced by:  imp44  596  imp5g  600  omordi  7234  omwordri  7240  omass  7248  oewordri  7260  elspansn5  26492  atcvat3i  27315  mdsymlem5  27326  sumdmdlem  27337  cvrat4  35167

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