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Axiom ax-in2 528
Description: 'Not' elimination. Axiom 5 of 10 for intuitionistic logic.
Assertion
Ref Expression
ax-in2

Detailed syntax breakdown of Axiom ax-in2
StepHypRef Expression
1 wph . . 3
21wn 3 . 2
3 wps . . 3
41, 3wi 4 . 2
52, 4wi 4 1
Colors of variables: wff set class
This axiom is referenced by:  pm2.21  530  con2d  536
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