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Theorem jarl 163
Description: Elimination of a nested antecedent as a kind of reversal of inference ja 161. (Contributed by Wolf Lammen, 10-May-2013.)
Assertion
Ref Expression
jarl

Proof of Theorem jarl
StepHypRef Expression
1 pm2.21 108 . 2
21imim1i 58 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  ->wi 4
This theorem is referenced by:  pm2.68  410  merco2  1569  rp-fakeimass  37736
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8
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