Step
*
of Lemma
int-prod-factor
∀[n:ℕ]. ∀[f,g:ℕn ⟶ ℤ]. (Π(f[x] * g[x] | x < n) = (Π(f[x] | x < n) * Π(g[x] | x < n)) ∈ ℤ)
BY
{ (PrimrecInductionOn `n'⋅ THEN Auto THEN RWO "-3" 0 THEN Auto) }
Latex:
Latex:
\mforall{}[n:\mBbbN{}]. \mforall{}[f,g:\mBbbN{}n {}\mrightarrow{} \mBbbZ{}]. (\mPi{}(f[x] * g[x] | x < n) = (\mPi{}(f[x] | x < n) * \mPi{}(g[x] | x < n)))
By
Latex:
(PrimrecInductionOn `n'\mcdot{} THEN Auto THEN RWO "-3" 0 THEN Auto)
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