proposition: Lemma D_Rball_pred: forall c r n f, D_Rball c r (S n) f -> D_Rball c r n f.
proof: Proof. intros ; apply C_Rball_implies_D_Rball, D_Rball_S_implies_C_Rball ; assumption. Qed.
imports: Rbase Ranalysis Lia Lra Rfunctions Rfunction_facts Rextensionality Rinterval Ranalysis_def Ranalysis_def_simpl Ranalysis_facts Ranalysis_continuity Ranalysis_derivability Ranalysis_monotonicity Rfunction_classes_def MyR_dist Reals.Tactics