| list2set(refs) ∩ list2set(refs0) = ∅, # refs = i→n(countrefs(i ' + ints0)), 0 ≤ i0, posints(ints0), 0 ≤ i, r ∈ refs0, i ≤ i0, ∀ r. r ∈ refs0 → newref(r, st) ⊦ dups(refs0), newref(r, st), 0 ∈ (i0 ' + ints0) .butlast, r ∈ refs |
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r)]]