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Step * of Lemma comb_for_absval_wf

λx,z. |x| ∈ x:ℤ ⟶ (↓True) ⟶ ℕ
BY
{ (ProveOpCombinatorTyping Auto) `absval_wf` }

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Latex:

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Latex:
\mlambda{}x,z.  |x|  \mmember{}  x:\mBbbZ{}  {}\mrightarrow{}  (\mdownarrow{}True)  {}\mrightarrow{}  \mBbbN{}


By

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Latex:
(ProveOpCombinatorTyping  Auto)  `absval\_wf`

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