proposition: Lemma ltW_nhomo : {homo f : x y /~ x < y} -> {homo f : x y /~ x <= y}.
proof: Proof. by apply: homoW=> // x y; rewrite eq_sym. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(path fintype tuple bigop finset div prime finfun) mathcomp(finset)