fact: Definition divz (m d : int) := let: (K, n) := match m with Posz n => (Posz, n) | Negz n => (Negz, n) end in sgz d * K (n %/ `|d|)%N.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq choice fintype order bigop ssralg) mathcomp(div ssrnum ssrint rat prime path binomial) mathcomp(tuple finset) gaia(fibm)