fact: Definition Qball_ex_bool (e:QposInf) (a b:Q) : bool := match ball_ex_dec _ Qmetric_dec e a b with left _ => true | right _ => false end.
imports: CoRN.metric2.Metric CoRN.metric2.Prelength CoRN.metric2.Classification CoRN.model.totalorder.QMinMax CoRN.model.totalorder.QposMinMax Coq.QArith.Qabs CoRN.metric2.UniformContinuity MathClasses.implementations.stdlib_rationals Coq.QArith.Qround