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The classification of preordered spaces in terms of monotones: complexity and optimization

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  • Pedro Hack
  • Daniel A. Braun
  • Sebastian Gottwald

Abstract

The study of complexity and optimization in decision theory involves both partial and complete characterizations of preferences over decision spaces in terms of real-valued monotones. With this motivation, and following the recent introduction of new classes of monotones, like injective monotones or strict monotone multi-utilities, we present the classification of preordered spaces in terms of both the existence and cardinality of real-valued monotones and the cardinality of the quotient space. In particular, we take advantage of a characterization of real-valued monotones in terms of separating families of increasing sets in order to obtain a more complete classification consisting of classes that are strictly different from each other. As a result, we gain new insight into both complexity and optimization, and clarify their interplay in preordered spaces.

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  • Pedro Hack & Daniel A. Braun & Sebastian Gottwald, 2022. "The classification of preordered spaces in terms of monotones: complexity and optimization," Papers 2202.12106, arXiv.org, revised Aug 2022.
    • Handle: RePEc:arx:papers:2202.12106
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    References listed on IDEAS

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    1. Herden, G., 1989. "On the existence of utility functions," Mathematical Social Sciences, Elsevier, vol. 17(3), pages 297-313, June.
    2. Herden, G., 1989. "On the existence of utility functions ii," Mathematical Social Sciences, Elsevier, vol. 18(2), pages 107-117, October.
    3. Alcantud, José Carlos R. & Bosi, Gianni & Zuanon, Magalì, 2013. "Representations of preorders by strong multi-objective functions," MPRA Paper 52329, University Library of Munich, Germany.
    4. Peleg, Bezalel, 1970. "Utility Functions for Partially Ordered Topological Spaces," Econometrica, Econometric Society, vol. 38(1), pages 93-96, January.
    5. Evren, Özgür & Ok, Efe A., 2011. "On the multi-utility representation of preference relations," Journal of Mathematical Economics, Elsevier, vol. 47(4-5), pages 554-563.
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    Cited by:

    1. Pedro Hack & Daniel A. Braun & Sebastian Gottwald, 2022. "On a geometrical notion of dimension for partially ordered sets," Papers 2203.16272, arXiv.org, revised Sep 2022.

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