| # refs = i→n(countrefs(ints)), posints(ints), 0 ≤ i ⊦ (addarrays(refs, ty, ints, i, st)[r -- sk]) = st[r -- sk], ints = [], n→i(# refs) = countrefs(ints), r ∈ refs |
⊦ abs(countrefs(ints)) = countrefs(ints)
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ n→i(i→n(i)) = abs(i)])]]