Theorem imbi2 324

Description: Theorem *4.85 of [WhiteheadRussell] p. 122. (Contributed by NM, 3-Jan-2005.) (Proof shortened by Wolf Lammen, 19-May-2013.)

Assertion

Ref	Expression
imbi2

Proof of Theorem imbi2

Step	Hyp	Ref	Expression
1		id 22	. 2
2	1	imbi2d 316	1

Syntax hints:  ->wi 4  <->wb 184

This theorem is referenced by:  relexpindlem  29062  relexpind  29063  3impexpbicom  33221  sbcim2g  33309  3impexpbicomVD  33657  sbcim2gVD  33675  csbeq2gVD  33692  con5VD  33700  hbexgVD  33706  ax6e2ndeqVD  33709  2sb5ndVD  33710  ax6e2ndeqALT  33731  2sb5ndALT  33732  bj-ifbi2  37700  bj-ifbi3  37701

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