proposition: Lemma ARtoCR_preserves_arctan x : ' ucFun ARarctan x = ucFun arctan ('x).
proof: Proof. apply preserves_unary_complete_fun. Qed.
imports: CoRN.algebra.RSetoid CoRN.metric2.Metric CoRN.metric2.UniformContinuity CoRN.metric2.MetricMorphisms CoRN.reals.fast.CRarctan_small CoRN.reals.fast.CRarctan CoRN.reals.fast.CRpi_fast CoRN.reals.faster.ARpi CoRN.reals.faster.ARarctan_small CoRN.reals.faster.ARArith