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Axiom ax-io 606
Description: Definition of 'or'. Axiom 6 of 10 for intuitionistic logic. (Contributed by Mario Carneiro, 31-Jan-2015.)
Assertion
Ref Expression
ax-io

Detailed syntax breakdown of Axiom ax-io
StepHypRef Expression
1 wph . . . 4
2 wch . . . 4
31, 2wo 605 . . 3
4 wps . . 3
53, 4wi 4 . 2
61, 4wi 4 . . 3
72, 4wi 4 . . 3
86, 7wa 95 . 2
95, 8wb 96 1
Colors of variables: wff set class
This axiom is referenced by:  jaob  607
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