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Theorem pm2.24 101
Description: Theorem *2.24 of [WhiteheadRussell] p. 104. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm2.24

Proof of Theorem pm2.24
StepHypRef Expression
1 pm2.21 100 . 2
21com12 27 1
Colors of variables: wff setvar class
Syntax hints:   wn 3   wi 4
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8
This theorem is referenced by:  pm4.81  355  orc  374  pm2.82  825  dedlema  920
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