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Theorem pm3.2an3 1131
Description: pm3.2 434 for a triple conjunction. (Contributed by Alan Sare, 24-Oct-2011.)
Assertion
Ref Expression
pm3.2an3

Proof of Theorem pm3.2an3
StepHypRef Expression
1 pm3.2 434 . . 3
21ex 423 . 2
3 df-3an 936 . . 3
43bicomi 193 . 2
52, 4syl8ib 222 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wa 358   w3a 934
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  df-3an 936
This theorem is referenced by:  3exp  1150
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