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Theorem pm4.82 894
Description: Theorem *4.82 of [WhiteheadRussell] p. 122. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm4.82

Proof of Theorem pm4.82
StepHypRef Expression
1 pm2.65 164 . . 3
21imp 418 . 2
3 pm2.21 100 . . 3
4 pm2.21 100 . . 3
53, 4jca 518 . 2
62, 5impbii 180 1
Colors of variables: wff setvar class
Syntax hints:   wn 3   wi 4   wb 176   wa 358
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 177  df-an 360
This theorem is referenced by: (None)
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