proposition: Lemma ltr_expeR : {mono expeR : x y / x < y}.
proof: Proof. move=> [r| |] [s| |]//=; rewrite ?ltry//. - by rewrite !lte_fin ltr_expR. - by rewrite !ltNge lee_fin expR_ge0 leNye. - by rewrite lte_fin expR_gt0 ltNye. Qed.
imports: mathcomp(all_ssreflect ssralg ssrint ssrnum matrix) mathcomp(interval rat) mathcomp(boolp classical_sets functions) mathcomp(mathcomp_extra) reals ereal signed topology normedtype landau sequences derive realfun itv convex