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Theorem 3mix1 1072
Description: Introduction in triple disjunction. (Contributed by NM, 4-Apr-1995.)
Assertion
Ref Expression
3mix1

Proof of Theorem 3mix1
StepHypRef Expression
1 orc 632 . 2
2 3orass 887 . 2
31, 2sylibr 137 1
Colors of variables: wff set class
Syntax hints:   wi 4   wo 628   w3o 883
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 629
This theorem depends on definitions:  df-bi 110  df-3or 885
This theorem is referenced by:  3mix2  1073  3mix3  1074  3mix1i  1075  3mix1d  1078  3jaob  1196  nntri3or  6011  elnn0z  8034  nn01to3  8328  fztri3or  8673
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