proposition: Lemma Rfloor_natz (z : int) : Rfloor z%:~R = z%:~R :> R.
proof: Proof. by apply/range1zP/range1rr. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra) mathcomp(mathcomp_extra boolp classical_sets set_interval) Setoid