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Ara es mostren els items 97-109 de 109

    • T-equivalences : the metric behavior revisited 

      Fuster-Parra, Pilar; Martín Broto, Javier; Recasens Ferrés, Jorge; Valero Sierra, Óscar (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-01)
      Article
      Accés obert
      Since the notion of T-equivalence, where T is a t-norm, was introduced as a fuzzy generalization of the notion of crisp equivalence relation, many researchers have worked in the study of the metric behavior of such fuzzy ...

    • T-generable indistinguishability operators and their use for feature selection and classification. 

      Armengol, Eva; Boixader Ibáñez, Dionís; Garcia-Cerdaña, Angel; Recasens Ferrés, Jorge (2019)
      Article
      Accés obert

    • T-Indistinguishability Operators with respect to Ordinal Sums. 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2012)
      Text en actes de congrés
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    • The group of isometries of an indistinguishability operator 

      Jacas Moral, Juan; Recasens Ferrés, Jorge (2004-08)
      Article
      Accés restringit per política de l'editorial
      This paper studies some geometric aspects of indistinguishability operators (also called similarities and fuzzy equivalences). Concretely, it will be focused on the (geometric) group associated to a T-indistinguishability ...

    • The Length and Betweenness Relations of Indistinguishability Operators 

      Boixader Ibáñez, Dionís; Jacas Moral, Juan; Recasens Ferrés, Jorge (1999-06)
      Article
      Accés restringit per política de l'editorial
      The most common ways used to generate indistinguishability operators, namely as transitive closure of reexive and symmetric fuzzy relation, via the Representation Theorem and as decomposable relations, is related for ...

    • The structure of decomposable indistinguishability operators 

      Recasens Ferrés, Jorge (2008-11)
      Article
      Accés restringit per política de l'editorial
      Decomposable fuzzy relations are studied. Symmetric fuzzy relations are proved to be generated by a single fuzzy subset. For Archimedean t-norms, decomposable indistinguishability operators generate special kinds of ...

    • Transitive closure and betweenness relations 

      Boixader Ibáñez, Dionís; Jacas Moral, Juan; Recasens Ferrés, Jorge (2001-06)
      Article
      Accés restringit per política de l'editorial
      Indistinguishability operators fuzzify the concept of equivalence relation and have been proved a useful tool in theoretical studies as well as in di0erent applications such as fuzzy control or approximate reasoning. One ...

    • Transitive closure of interval-valued fuzzy relations 

      González del Campo, Ramón; Garmendia Salvador, Luis; Recasens Ferrés, Jorge (2013-07)
      Article
      Accés obert
      In this paper are introduced some concepts of interval-valued fuzzy relations and some of their properties: reflexivity, symmetry, T-transitivity, composition and local reflexivity. The existence and uniqueness of T-transitive ...

    • Transitive Closure of Interval-valued Relations 

      González del Campo, Ramón; Garmendia Salvador, Luis; Recasens Ferrés, Jorge (2009)
      Text en actes de congrés
      Accés obert
      This paper introduces some concepts of intervalvalued fuzzy relations and some of their properties: reflexivity, symmetry, T-transitivity, composition and locally reflexivity. It is also introduced the concept of T-transitive ...

    • Transitive Openings 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2011)
      Text en actes de congrés
      Accés obert

    • Transitivity of fuzzy relations under discretization 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2013-07-10)
      Article
      Accés restringit per política de l'editorial
      Fuzzy transitivity is a key property for many fuzzy relational structures, such as fuzzy preorders and equivalences. Theoretical models for practical problems which are based on fuzzy relations make use of continuous scales, ...

    • Upper and Lower Approximations of Fuzzy Sets 

      Boixader Ibáñez, Dionís; Jacas Moral, Juan; Recasens Ferrés, Jorge (2000-09)
      Article
      Accés restringit per política de l'editorial
      The upper and lower approximations of a fuzzy subset with respect to an indistinguish-ability operator are studied. Their relations with fuzzy rough sets are also investigated

    • Vague and fuzzy t-norms and t-conorms 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2021-01-01)
      Article
      Accés obert
      t-norms and t-conorms are the natural connectives “and” and “or” in fuzzy logic. The unit interval with a t-norm or a t-conorm is a special monoid and some submonoids like discrete t-norms and t-conorms have been proved ...