proposition: Lemma C_infty_opp : forall f, C_infty f -> C_infty (- f)%F.
proof: Proof. intros f Cf n ; apply C_opp ; trivial. 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