proposition: Lemma CRmorph_appart : forall {R1 R2 : ConstructiveReals} (f : @ConstructiveRealsMorphism R1 R2) (x y : CRcarrier R1) (app : x ≶ y), CRmorph f x ≶ CRmorph f y.
proof: Proof. intros. destruct app. - left. apply CRmorph_increasing. exact c. - right. apply CRmorph_increasing. exact c. Defined.
imports: QArith Qabs ConstructiveReals ConstructiveLimits ConstructiveAbs