| ⊦ 0 ≤ i → addarrays(r ', ty, i ', j, st) = addarray(r, mktype_from_dims(ty, countdims(i ', j)), i, st) |
0 ≤ i ⊦ addarrays(r ', ty, i ', j, st) = addarray(r, mktype_from_dims(ty, countdims(i ', j)), i, st)
[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j])]]