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Step * of Lemma comb_for_firstn_wf

λA,as,n,z. firstn(n;as) ∈ A:Type ⟶ as:(A List) ⟶ n:ℤ ⟶ (↓True) ⟶ (A List)
BY
{ (ProveOpCombinatorTyping Auto) `firstn_wf` }

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Latex:

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Latex:
\mlambda{}A,as,n,z.  firstn(n;as)  \mmember{}  A:Type  {}\mrightarrow{}  as:(A  List)  {}\mrightarrow{}  n:\mBbbZ{}  {}\mrightarrow{}  (\mdownarrow{}True)  {}\mrightarrow{}  (A  List)


By

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Latex:
(ProveOpCombinatorTyping  Auto)  `firstn\_wf`

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