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Proof step 9 from proof square-neq-prime (previous step)

j * j = i * j0 * j0, prime(i), j ≠ 0 ∨ j0 ≠ 0 ⊦ ¬ j ≤ 0, 0 < j ∧ 0 ≤ j0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 10:
j * j = i * j0 * j0, prime(i), j ≤ 0, j ≠ 0 ∨ j0 ≠ 0 ⊦

Rule argument

Additional information

Used simplifier rules: forward-le-04: ⊦ j ≤ i ∧ i ≤ 0 → j ≤ 0; (forward) from specification int-abs%lenls: ⊦ i ≤ j → ¬ j < i; from specification int-abs