proposition: Lemma divz_eq m d : m = (m %/ d)%Z * d + (m %% d)%Z.
proof: Proof. by rewrite addrC subrK. 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)