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Step * of Lemma comb_for_gcd_p_wf

λa,b,y,z. GCD(a;b;y) ∈ a:ℤ ⟶ b:ℤ ⟶ y:ℤ ⟶ (↓True) ⟶ ℙ
BY
{ (ProveOpCombinatorTyping Auto) `gcd_p_wf` }

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Latex:

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Latex:
\mlambda{}a,b,y,z.  GCD(a;b;y)  \mmember{}  a:\mBbbZ{}  {}\mrightarrow{}  b:\mBbbZ{}  {}\mrightarrow{}  y:\mBbbZ{}  {}\mrightarrow{}  (\mdownarrow{}True)  {}\mrightarrow{}  \mBbbP{}


By

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Latex:
(ProveOpCombinatorTyping  Auto)  `gcd\_p\_wf`

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