proposition: Lemma ltm_add m1 m2 n1 n2 : (m1 < n1 -> m2 < n2 -> (m1 + m2)%MM < (n1 + n2)%MM)%O.
proof: Proof. by move=> lt1 /ltW /(ltmc_le_add lt1). Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype tuple finfun bigop finset binomial) mathcomp(order fingroup perm ssralg zmodp poly ssrint) mathcomp(matrix vector) mathcomp(bigenough) ssrcomplements freeg