proposition: Lemma Integral_minus:forall s t, ((IntegralQ s)-(IntegralQ t)==(IntegralQ (s - t)))%Q.
proof: Proof. intros s t. unfold Qminus. rewrite -> Integral_opp, Integral_plus. apply IntegralQ_wd. ring. Qed.
imports: CoRN.algebra.RSetoid CoRN.metric2.Metric CoRN.metric2.UniformContinuity CoRN.model.totalorder.QposMinMax CoRN.model.structures.StepQsec CoRN.metric2.UniformContinuity CoRN.metric2.Prelength CoRN.model.structures.OpenUnit Coq.QArith.QArith CoRN.model.totalorder.QMinMax Coq.QArith.Qabs CoRN.model.ordfields.Qordfield CoRN.model.metric2.Qmetric CoRN.algebra.COrdFields2 CoRN.tactics.CornTac