proposition: Lemma ltW_homo_in : {in D & D', {homo f : x y / x < y}} -> {in D & D', {homo f : x y / x <= y}}.
proof: Proof. exact: homoW_in. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(path fintype tuple bigop finset div prime finfun) mathcomp(finset)