| ∀ j, i0. i1 + j = i1 + i0 → j = i0, i1 -1 + j = i1 -1 + i0 ⊦ j = i0 |
i1 + j = i1 + i0, ∀ j, i0. i1 + j = i1 + i0 → j = i0 ⊦ j = i0
Used simplifier rules: add-pred-01: ⊦ i -1 + j = (i + j)-1;%add-a: ⊦ i + j + i0 = (i + j) + i0;%add-c: ⊦ i + j = j + i;%pred-in: ⊦ i -1 = j -1 ↔ i = j; from specification int-basic1