ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  bi2.04 Structured version   Unicode version

Theorem bi2.04 237
Description: Logical equivalence of commuted antecedents. Part of Theorem *4.87 of [WhiteheadRussell] p. 122. (Contributed by NM, 5-Aug-1993.)
Assertion
Ref Expression
bi2.04

Proof of Theorem bi2.04
StepHypRef Expression
1 pm2.04 76 . 2
2 pm2.04 76 . 2
31, 2impbii 117 1
Colors of variables: wff set class
Syntax hints:   wi 4   wb 98
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia2 100  ax-ia3 101
This theorem depends on definitions:  df-bi 110
This theorem is referenced by:  imim21b  241  pm4.87  493  imimorbdc  794  sbcom2v  1858  mor  1939  r19.21t  2388  reu8  2731  ra5  2840  unissb  3601  reusv3  4158  tfi  4248  fun11  4909  prime  8093  raluz2  8278  bj-inf2vnlem2  9401
  Copyright terms: Public domain W3C validator