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Theorem axi5r 2427
Description: Converse of ax-c4 (intuitionistic logic axiom ax-i5r). (Contributed by Jim Kingdon, 31-Dec-2017.)
Assertion
Ref Expression
axi5r

Proof of Theorem axi5r
StepHypRef Expression
1 hba1 1896 . . 3
2 hba1 1896 . . 3
31, 2hbim 1922 . 2
4 sp 1859 . . 3
54imim2i 14 . 2
63, 5alrimih 1642 1
Colors of variables: wff setvar class
Syntax hints:  ->wi 4  A.wal 1393
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-5 1704  ax-6 1747  ax-7 1790  ax-10 1837  ax-12 1854
This theorem depends on definitions:  df-bi 185  df-ex 1613  df-nf 1617
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