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Step * of Lemma comb_for_b2i_wf

λb,z. b2i(b) ∈ b:𝔹 ⟶ (↓True) ⟶ ℤ
BY
{ (ProveOpCombinatorTyping Auto{1,3}-1) `b2i_wf` }

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Latex:

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Latex:
\mlambda{}b,z.  b2i(b)  \mmember{}  b:\mBbbB{}  {}\mrightarrow{}  (\mdownarrow{}True)  {}\mrightarrow{}  \mBbbZ{}


By

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Latex:
(ProveOpCombinatorTyping  Auto\{1,3\}-1)  `b2i\_wf`

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