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Proof step 4 from proof prime-def-prime (previous step)

1 < i, 0 < i, prime(i) ⊦ prime(i) ↔ (∀ j. prime(j) ∧ j * j ≤ i → ¬ j | i)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information