proposition: Lemma dvdz_mul2r p d m : p != 0 -> (d * p %| m * p)%Z = (d %| m)%Z.
proof: Proof. by rewrite !dvdzE -absz_gt0 !abszM; apply: dvdn_pmul2r. 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)