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Proof step 4 from proof primes-not-neg (previous step)

∀ i. i ∈ ints → prime(i), i ∈ ints, i < 0 ⊦

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 1 terms: i

Additional information

Used simplifier rules: prime-not-neg: ⊦ j < 0 → ¬ prime(j); from specification int-gcd Used terms: i