proposition: Lemma ltr_pMn2r n : (0 < n)%N -> {mono (@GRing.natmul R)^~ n : x y / x < y}.
proof: Proof. by move/ler_pMn2r/leW_mono. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)