Step
*
of Lemma
lifting-isaxiom-isaxiom
∀[a,b,c,d,e:Top].
(if if a = Ax then b otherwise c = Ax then d otherwise e
~ if a = Ax then if b = Ax then d otherwise e otherwise if c = Ax then d otherwise e)
BY
{ ProveLiftingLemma }
Latex:
Latex:
\mforall{}[a,b,c,d,e:Top].
(if if a = Ax then b otherwise c = Ax then d otherwise e
\msim{} if a = Ax then if b = Ax then d otherwise e otherwise if c = Ax then d otherwise e)
By
Latex:
ProveLiftingLemma
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