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Proof step 4 from proof product-del1-02 (previous step)

i ∈ ints0, ∀ i. i ∈ ints0 → i * Π(ints0 -1l i) = Π ints0 ⊦ i = i0, i0 = 0, i * Π(ints0 -1l i) = Π ints0

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 2 terms: i

Additional information

Used terms: i