fact: Definition hemiMetric (e:Q) (A B: X -> Prop) := forall x:X, A x -> existsC X (fun (y:X) => B y /\ ball e x y).
imports: CoRN.algebra.RSetoid CoRN.logic.Classic CoRN.metric2.Metric CoRN.metric2.Classification Coq.Lists.List Coq.ZArith.ZArith CoRN.model.totalorder.QMinMax CoRN.model.totalorder.QposMinMax