proposition: Lemma Rfloor_le0 x : x <= 0 -> Rfloor x <= 0.
proof: Proof. by move=> ?; rewrite -Rfloor0 le_Rfloor. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra) mathcomp(mathcomp_extra boolp classical_sets set_interval) Setoid