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Proof step 1 from proof product-del1-01 (conclusion)

⊦ i ∈ ints ∧ i ≠ 0 → Π(ints -1l i) = Π ints / i

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
i ∈ ints ⊦ i = 0, Π(ints -1l i) = Π ints / i

Rule argument

Additional information