proposition: Lemma floor_ge0 x : (0 <= floor x) = (0 <= x).
proof: Proof. by rewrite -(@ler_int R) -RfloorE -Rfloor_ge_int. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra) mathcomp(mathcomp_extra boolp classical_sets set_interval) Setoid