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Axiom ax-in2 545
Description: 'Not' elimination. Axiom 5 of 10 for intuitionistic logic. (Contributed by Mario Carneiro, 31-Jan-2015.)
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  547  con2d  554  condc  748  dcim  783  imorr  796  pm5.14dc  816  pm5.54dc  826  mon  1926  difin  3168  indifdir  3187  sosng  4356  iotanul  4825
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