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Theorem 3oran 992
Description: Triple disjunction in terms of triple conjunction. (Contributed by NM, 8-Oct-2012.)
Assertion
Ref Expression
3oran

Proof of Theorem 3oran
StepHypRef Expression
1 3ioran 991 . . 3
21con1bii 331 . 2
32bicomi 202 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  <->wb 184  \/w3o 972  /\w3a 973
This theorem is referenced by:  dalawlem10  35604
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 185  df-or 370  df-an 371  df-3or 974  df-3an 975
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