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Proof step 19 from proof four-square-mod-zero (previous step)

i2 ^2 + i1 ^2 + i0 ^2 + (j0 * i3)^2 = j0 * j, prime(j), j0 < j, 1 < j, 0 < j, 0 < j0, 0 ≤ j, j0 | i1, ∃ i1. j0 * i1 = i0, j0 | i2 ⊦ j0 = 1, j = 2

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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