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Theorem 3orrot 940
Description: Rotation law for triple disjunction. (Contributed by NM, 4-Apr-1995.)
Assertion
Ref Expression
3orrot

Proof of Theorem 3orrot
StepHypRef Expression
1 orcom 376 . 2
2 3orass 937 . 2
3 df-3or 935 . 2
41, 2, 33bitr4i 268 1
Colors of variables: wff setvar class
Syntax hints:   wb 176   wo 357   w3o 933
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8
This theorem depends on definitions:  df-bi 177  df-or 359  df-3or 935
This theorem is referenced by:  3mix2  1125  3mix3  1126  eueq3  3011  tprot  3815  nncdiv3  6277
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