Please use this identifier to cite or link to this item: http://hdl.handle.net/10077/4290

 Title: The Concept of Separable Connectedness: Applications to General Utility Theory Authors: Induráin, Esteban Keywords: Topological connectednessseparabilityordered topological spacesutility functions Issue Date: 2001 Publisher: Università degli Studi di Trieste. Dipartimento di Scienze Matematiche Citation: Esteban Induráin, "The Concept of Separable Connectedness: Applications to General Utility Theory", in: Rendiconti dell’Istituto di Matematica dell’Università di Trieste. An International Journal of Mathematics, 32 (2001) suppl.2, pp. 89–99. Series/Report no.: Rendiconti dell’Istituto di Matematica dell’Università di Trieste. An International Journal of Mathematics32 (2001) suppl.2 Abstract: We say that a topological set X is separably connected if for any two points $x,\; y\;\epsilon\; X$ there exists a connected and separable subset $C\left(x,y\right)\subseteq X$ to which both x and y belong. This concept generalizes path-connectedness. With this concept we have improved some results on general utility theory: For instance, in 1987 Monteiro gave conditions (dealing with real-valued, continuous, order-preserving functions) on path-connected spaces in order to get continuous utility representations of continuous total preorders defi{}ned on the set. We have recently proved (in an article by Candeal, Hervès and Indurain, published in the Journal of Mathematical Economics, 1998) that Monteiro\textquoteright{}s results also work for the more general case of separably connected spaces. Then we study the particular situation of separable connectedness on spaces endowed with some extra structure, e.g. metric spaces. URI: http://hdl.handle.net/10077/4290 ISSN: 0049-4704 MS Classification: 54D0590A1054D6554C3054F05 Appears in Collections: Rendiconti dell‘ Istituto di matematica dell‘ Università di Trieste: an International Journal of Mathematics vol.32 (2001) s2

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