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Step * of Lemma comb_for_massoc_wf

λg,a,b,z. (a ~ b) ∈ g:GrpSig ⟶ a:|g| ⟶ b:|g| ⟶ (↓True) ⟶ ℙ
BY
{ ProveOpCombTyping `massoc_wf` }

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Latex:

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Latex:
\mlambda{}g,a,b,z.  (a  \msim{}  b)  \mmember{}  g:GrpSig  {}\mrightarrow{}  a:|g|  {}\mrightarrow{}  b:|g|  {}\mrightarrow{}  (\mdownarrow{}True)  {}\mrightarrow{}  \mBbbP{}


By

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Latex:
ProveOpCombTyping  `massoc\_wf`

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