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Step * 1 of Lemma genfact_wf

.....assertion..... 
∀[n:ℕ]. ∀[f:ℕ+ ⟶ ℤ]. ∀[b:ℤ].  (genfact(n;b;m.f[m]) ∈ ℤ)
BY
{ ((InductionOnNat THEN Auto) THEN Unfold `genfact` 0 THEN Auto) }

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Latex:

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Latex:
.....assertion..... 
\mforall{}[n:\mBbbN{}].  \mforall{}[f:\mBbbN{}\msupplus{}  {}\mrightarrow{}  \mBbbZ{}].  \mforall{}[b:\mBbbZ{}].    (genfact(n;b;m.f[m])  \mmember{}  \mBbbZ{})


By

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Latex:
((InductionOnNat  THEN  Auto)  THEN  Unfold  `genfact`  0  THEN  Auto)

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