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Theorem pm3.48 806
Description: Theorem *3.48 of [WhiteheadRussell] p. 114. (Contributed by NM, 28-Jan-1997.)
Assertion
Ref Expression
pm3.48

Proof of Theorem pm3.48
StepHypRef Expression
1 orc 374 . . 3
21imim2i 13 . 2
3 olc 373 . . 3
43imim2i 13 . 2
52, 4jaao 495 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   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:  orim12d  811
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