proposition: Lemma dvdz_lcm_6_4 (m : int) : (6 %| m -> 4 %| m -> 12 %| m)%Z.
proof: Proof. lia. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(div choice fintype tuple finfun bigop finset prime) mathcomp(binomial ssralg countalg ssrnum ssrint rat intdiv) mathcomp(zify)