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Proof step 16 from proof square-neq-pos (previous step)

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

User applied rule weakening

And obtained the following new goals

Rule argument

poslist: left 2

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