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Proof step 6 from proof square-neq-pos (previous step)

(j * j) / gcd(j, j0) = (i * j0 * j0) / gcd(j, j0), j * j = i * j0 * j0, prime(i), 0 < j, 0 ≤ j0 ⊦ gcd(j, j0) = 1

User applied rule weakening

And obtained the following new goals

Rule argument

poslist: left 2

Additional information