proposition: Lemma Gauss_dvdzl m n p : coprimez m p -> (m %| n * p)%Z = (m %| n)%Z.
proof: Proof. by rewrite mulrC; apply: Gauss_dvdzr. 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)