Theorem imbi1 323

Description: Theorem *4.84 of [WhiteheadRussell] p. 122. (Contributed by NM, 3-Jan-2005.)

Assertion

Ref	Expression
imbi1

Proof of Theorem imbi1

Step	Hyp	Ref	Expression
1		id 22	. 2
2	1	imbi1d 317	1

Syntax hints:  ->wi 4  <->wb 184

This theorem is referenced by:  imbi1i  325  3impexpVD  33656  ancomstVD  33665  onfrALTVD  33691  hbimpgVD  33704  hbexgVD  33706  ax6e2ndeqVD  33709  ax6e2ndeqALT  33731  bj-ifbi1  37699

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