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Step * of Lemma inl_equal

∀[A,B:Type]. ∀[x,y:A].  uiff((inl x) = (inl y) ∈ (A + B);x = y ∈ A)
BY
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Latex:

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Latex:
\mforall{}[A,B:Type].  \mforall{}[x,y:A].    uiff((inl  x)  =  (inl  y);x  =  y)


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Latex:
Auto

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