proposition: Lemma divz_ge0 m d : d > 0 -> ((m %/ d)%Z >= 0) = (m >= 0).
proof: Proof. by case: d m => // d [] n d_gt0; rewrite (divz_nat, divNz_nat). Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq path) mathcomp(div choice fintype tuple finfun bigop prime order) mathcomp(ssralg poly ssrnum ssrint archimedean rat matrix) mathcomp(polydiv perm zmodp mxalgebra vector)