fact: Definition regFunBall {X:Type} (ball : Q->X->X->Prop) (e:Q) (f g : RegularFunction ball) : Prop := forall (d1 d2:Qpos), ball (proj1_sig d1 + e + proj1_sig d2) (approximate f d1) (approximate g d2).
imports: CoRN.metric2.UniformContinuity CoRN.model.structures.QposInf CoRN.metric2.Classification CoRN.model.totalorder.QposMinMax CoRN.model.totalorder.QMinMax