proposition: Lemma IR_div_as_CR_1 :forall x y y_, (IRasCR (x[/]y[//]y_)== IRasCR x * CRinvT (IRasCR y) (map_pres_ap_zero _ _ (iso_map_rht _ _ CRIR_iso) y y_))%CR.
proof: Proof. intros; apply IR_div_as_CR. Qed.
imports: CoRN.algebra.RSetoid CoRN.metric2.Metric CoRN.metric2.UniformContinuity CoRN.reals.CauchySeq CoRN.reals.iso_CReals CoRN.reals.R_morphism CoRN.reals.fast.CRArith CoRN.model.reals.CRreal CoRN.tactics.CornTac