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Proof step 25 from proof four-square-mod-zero (previous step)

(j0 * i0)^2 + i1 ^2 + (j0 * i)^2 + (j0 * i3)^2 = j0 * j, prime(j), j0 < j, 1 < j, 0 < j, 0 < j0, 0 ≤ j, ∃ i0. j0 * i0 = i1 ⊦ j0 = 1, j = 2

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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