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Theorem pm4.79 566
Description: Theorem *4.79 of [WhiteheadRussell] p. 121. (Contributed by NM, 3-Jan-2005.) (Proof shortened by Wolf Lammen, 27-Jun-2013.)
Assertion
Ref Expression
pm4.79

Proof of Theorem pm4.79
StepHypRef Expression
1 id 19 . . 3
2 id 19 . . 3
31, 2jaoa 496 . 2
4 simplim 143 . . . 4
5 pm3.3 431 . . . 4
64, 5syl5 28 . . 3
76orrd 367 . 2
83, 7impbii 180 1
Colors of variables: wff setvar class
Syntax hints:   wn 3   wi 4   wb 176   wo 357   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-or 359  df-an 360
This theorem is referenced by: (None)
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