fact: Definition CRasCRing : CRing := Build_CRing _ _ _ CRisCRing.
imports: CoRN.algebra.RSetoid CoRN.metric2.Metric CoRN.metric2.UniformContinuity CoRN.reals.fast.CRFieldOps CoRN.model.abgroups.CRabgroup CoRN.algebra.CRings CoRN.reals.fast.CRcorrect CoRN.tactics.Rational CoRN.tactics.CornTac