proposition: Lemma nth_derive_Rball_0: forall c r f (pr : D_Rball c r O f), nth_derive_Rball c r f pr == f.
proof: Proof. intros ; reflexivity. Qed.
imports: Reals Rfunction_classes Ranalysis_def Ranalysis_def_simpl Rfunction_def Rextensionality Ranalysis_continuity Ranalysis_derivability Ranalysis_monotonicity Rinterval Nth_derivative_def