| 2 ≤ i0 * i, i < 0, i0 < 0, ∀ i1. 1 < i1 ∧ i1 < i0 * i → ¬ i1 | i0 * i ⊦ i0 = 0, ~1 = i, i = 0, ~1 = i0 |
2 ≤ i0 * i, i < 0, i0 < 0, 1 < abs(i0) ∧ abs(i0) < i0 * i → ¬ abs(i0) | i0 * i, ∀ i1. 1 < i1 ∧ i1 < i0 * i → ¬ i1 | i0 * i ⊦ i0 = 0, ~1 = i, i = 0, ~1 = i0
Used terms: abs(i0)