| ⊦ ints ≠ [] → countrefs2(1 ' + ints) = 1 + countrefs2(ints) |
⊦ ints ≠ [] ∧ 0 < i → countrefs2(i ' + ints) = i + i * countrefs2(ints)
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ i + j = j + i], [CSIMPSEQ : ⊦ i + j + i0 = (i + j) + i0], [CSIMPSEQ : ⊦ i + j = i + i0 ↔ j = i0], [CSIMPSEQ : ⊦ (ints + ints0) + ints1 = ints + ints0 + ints1], [CSIMPSEQ : ⊦ i * j = j * i], [CSIMPSEQ : ⊦ i * j * j0 = (i * j) * j0], [CSIMPSEQ : ⊦ 1 * i = i])]]