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Step * of Lemma comb_for_mset_count_wf

λs,x,a,z. (x #∈ a) ∈ s:DSet ⟶ x:|s| ⟶ a:MSet{s} ⟶ (↓True) ⟶ ℕ
BY
{ ProveOpCombTyping `mset_count_wf` }

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Latex:

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Latex:
\mlambda{}s,x,a,z.  (x  \#\mmember{}  a)  \mmember{}  s:DSet  {}\mrightarrow{}  x:|s|  {}\mrightarrow{}  a:MSet\{s\}  {}\mrightarrow{}  (\mdownarrow{}True)  {}\mrightarrow{}  \mBbbN{}


By

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Latex:
ProveOpCombTyping  `mset\_count\_wf`

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