ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  pm2.67-2 Unicode version

Theorem pm2.67-2 633
Description: Slight generalization of Theorem *2.67 of [WhiteheadRussell] p. 107. (Contributed by NM, 3-Jan-2005.) (Revised by NM, 9-Dec-2012.)
Assertion
Ref Expression
pm2.67-2

Proof of Theorem pm2.67-2
StepHypRef Expression
1 orc 632 . 2
21imim1i 54 1
Colors of variables: wff set class
Syntax hints:   wi 4   wo 628
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-io 629
This theorem depends on definitions:  df-bi 110
This theorem is referenced by:  pm2.67  661  oibabs  799
  Copyright terms: Public domain W3C validator