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Step * of Lemma comb_for_mem_wf

λs,a,bs,z. (a ∈b bs) ∈ s:DSet ⟶ a:|s| ⟶ bs:(|s| List) ⟶ (↓True) ⟶ 𝔹
BY
{ (ProveOpCombinatorTyping Auto) `mem_wf` }

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Latex:

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Latex:
\mlambda{}s,a,bs,z.  (a  \mmember{}\msubb{}  bs)  \mmember{}  s:DSet  {}\mrightarrow{}  a:|s|  {}\mrightarrow{}  bs:(|s|  List)  {}\mrightarrow{}  (\mdownarrow{}True)  {}\mrightarrow{}  \mBbbB{}


By

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Latex:
(ProveOpCombinatorTyping  Auto)  `mem\_wf`

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