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Step * of Lemma outl_wf

∀[A,B:Type]. ∀[x:A + B].  outl(x) ∈ A supposing ↑isl(x)
BY
{ (Auto THEN All Reduce THEN Auto) }

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Latex:

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Latex:
\mforall{}[A,B:Type].  \mforall{}[x:A  +  B].    outl(x)  \mmember{}  A  supposing  \muparrow{}isl(x)


By

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Latex:
(Auto  THEN  All  Reduce  THEN  Auto)

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