fact: Definition uc_flip (X Y : MetricSpace) : ProductMS X Y --> ProductMS Y X.
imports: CoRN.model.totalorder.QposMinMax CoRN.metric2.Metric CoRN.metric2.Classification CoRN.metric2.UniformContinuity CoRN.metric2.Prelength CoRN.metric2.Complete CoRN.metric2.LocatedSubset Coq.Unicode.Utf8