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Step * 1 of Lemma nil_wf


1. T : Type
⊢ [] ∈ colist(T)
BY
{ (Unfold `nil` 0 THEN colistD 0 THEN BUnionLeft THEN Auto) }

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Latex:

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Latex:

1.  T  :  Type
\mvdash{}  []  \mmember{}  colist(T)


By

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Latex:
(Unfold  `nil`  0  THEN  colistD  0  THEN  BUnionLeft  THEN  Auto)

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