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Proof step 8 from proof product-positive (
previous step
)
i0 ∈ ints0, 0 < i, Π ints0 ≤ 0, Π ints0 < i, i0 ≤ 0, i0 < i, ∀ i1. i1 ∈ ints0 → 0 < i1 ⊦
Heuristic quantifier closing applied rule all left
And closed the goal!
Rule argument
pos: left 7 terms: i0
Additional information
Used simplifier rules: lenls: ⊦ i ≤ j → ¬ j < i; from specification int-abs Used terms: i0