proposition: Lemma coprimez_dvdl m n p : (m %| n)%N -> coprimez n p -> coprimez m p.
proof: Proof. exact: coprime_dvdl. 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)