| 0 < j0 * j0 ∧ 0 < 1, (i * i) * 1 = j * j0 * j0, gcd(i, j0) = 1, 0 < j0 ⊦ j0 = 0, ∃ i. j = i * i |
gcd(i, j0) = 1, i * i = j * j0 * j0, 0 < j0 ⊦ j0 = 0, ∃ i. j = i * i
Used simplifier rules: ⊦ 0 < i → (0 < i * j ↔ 0 < j);% ⊦ i * j = j * i;% ⊦ i * j * j0 = (i * j) * j0;% ⊦ 1 * i = i;