Ara es mostren els items 39-58 de 109

    • Fifty years of similarity relations: a survey of foundations and applications 

      Recasens Ferrés, Jorge (2021-11-18)
      Article
      Accés obert
      On the occasion of the 50th anniversary of the publication of Zadeh's significant paper Similarity Relations and Fuzzy Orderings, an account of the development of similarity relations during this time will be given. Moreover, ...
    • Finding close T-indistinguishability operators to a given proximity 

      Garmendia Salvador, Luis; Recasens Ferrés, Jorge (-, 2007)
      Text en actes de congrés
      Accés obert
      Two ways to approximate a proximity relation R (i.e. a reflexive and symmetric fuzzy relation) by a T-transitive one where T is a continuous archimedean t-norm are given. The first one aggregates the transitive closure R ...
    • Finite-valued indistinguishability operators 

      Mayor, Gaspar; Recasens Ferrés, Jorge (2011-10)
      Article
      Accés restringit per política de l'editorial
      Fuzzy equality relations or indistinguishability operators generalize the concepts of crisp equality and equivalence relations in fuzzy systems where inaccuracy and uncertainty is dealt with. They generate fuzzy granularity ...
    • Finitely valued indistinguishability operators 

      Mayor, Gaspar; Recasens Ferrés, Jorge (Springer Verlag, 2010)
      Text en actes de congrés
      Accés obert
    • Fixed points and generators of fuzzy relations 

      Jacas Moral, Juan; Recasens Ferrés, Jorge (1994-08)
      Article
      Accés restringit per política de l'editorial
      The fixed points of a T-indistinguishability operator are characterized as its generators in the sense of the Representation Theorem of Valverde. The geometric description of the set of fixed points of a reflexive and ...
    • Funciones de implicación borrosas basadas en potencias 

      Massenet, Sabastià; Recasens Ferrés, Jorge; Torrens, Joan (2016)
      Text en actes de congrés
      Accés obert
      La introducción de nuevas familias de funciones de implicación borrosas es una necesidad para poder elegir aquella más adecuada para una aplicación concreta. En esta línea, en este trabajo se introduce un nuevo tipo de ...
    • Fuzzy actions 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2017-01-01)
      Article
      Accés obert
      This paper generalizes (fuzzifies) actions of a monoid or group on a set to deal with situations where imprecision and uncertainty are present. Fuzzy actions can handle the granularity of a set or even create it by defining ...
    • Fuzzy Groups, Fuzzy Functions and Fuzzy Equivalence Relations 

      Demirci, M; Recasens Ferrés, Jorge (2004-06)
      Article
      Accés restringit per política de l'editorial
      To each fuzzy subgroup a fuzzy equivalence relation is associated and it is proved that a fuzzy subgroup is normal if and only if the operation of the group is compatible with its associated fuzzy equivalence relation. In ...
    • Fuzzy implication functions based on powers of continuous t-norms 

      Massanet, Sebastià; Recasens Ferrés, Jorge; Torrens, Joan (2017-04-01)
      Article
      Accés obert
      The modification (relaxation or intensification) of the antecedent or the consequent in a fuzzy “If, Then” conditional is an important asset for an expert in order to agree with it. The usual method to modify fuzzy ...
    • Fuzzy numbers and equality relations 

      Jacas Moral, Juan; Recasens Ferrés, Jorge (IEEE pub., 1993)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A general approach to the concept of fuzzy number associated to a generalized equality on the real line is given. As a result, the use of triangular and trapezoidal fuzzy numbers, among other types, is justified and a ...
    • Fuzzy t-transitive relations: eigenvectors and generators 

      Jacas Moral, Juan; Recasens Ferrés, Jorge (1995-02)
      Article
      Accés restringit per política de l'editorial
      After some preliminaries, the set of generators of a generalized equality relation (T-indistinguishability operator) is studied. This set is identified with the set of the eigenvectors of the relation. The relation between ...
    • Generating indistinguishability operators from prototypes 

      Hernández, E; Recasens Ferrés, Jorge (Wiley InterScience, 2002-11)
      Article
      Accés restringit per política de l'editorial
      Given a T-indistinguishability operator E defined between some fuzzy subsets of a universe of discourse X, this paper studies three ways to generate an indistinguishability operator on X compatible with E inspired by the ...
    • Generation and Characterization of Fuzzy T-preorders 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2015-05-28)
      Article
      Accés obert
      This article studies T-preorders that can be generated in a natural way by a single fuzzy subset. These T-preorders are called one-dimensional and are of great importance, because every T-preorder can be generated by ...
    • Hesitant fuzzy relations and their transitive closure 

      Garmendia Salvador, Luis; González del Campo, Ramón; Recasens Ferrés, Jorge (2016)
      Text en actes de congrés
      Accés obert
      Hesitant fuzzy relations and some of their operations are defined. A first definition of T-transitive property and its closure is defined.
    • Hesitant fuzzy sets and relations using lists 

      González del Campo, Ramón; Garmendia, Luis; Recasens Ferrés, Jorge; Montero, Javier (2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
    • How to make T-transitive a proximity relation 

      Garmendia Salvador, Luis; Recasens Ferrés, Jorge (2009-02)
      Article
      Accés restringit per política de l'editorial
      Three ways to approximate a proximity relation R (i.e., a reflexive and symmetric fuzzy relation) by a T -transitive one where T is a continuous Archimedean t-norm are given. The first one aggregates the transitive closure ...
    • Indistinguishability operators generated by fuzzy numbers 

      Jacas Moral, Juan; Recasens Ferrés, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2004)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A new way to generate indistinguishability operators coherent with the underlying ordering structure of the real Dine is given in the sense that this structure should be compatible with the betweenness relation generated ...
    • Indistinguishability operators with respect to different t-norms 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2012-04)
      Article
      Accés restringit per política de l'editorial
      An isomorphism f between two continuous Archimedean t-norms T and T′ transforms a T-indistinguishability operator E into a T′-indistinguishability operator f ∘ E and many interesting properties of E are transfered to f ∘ ...
    • Indistinguishability relations in Dempster-Shafer theory of evidence 

      Hernandez, E; Recasens Ferrés, Jorge (2004-05)
      Article
      Accés restringit per política de l'editorial
      Each theory or model implicitly defines its inherent notion of equality for the objects in question. In turn, this equality, and its counterpart, the mathematical concept of equivalence, provides the basis on which to ...
    • Introducing Strong T-transitivity in Approximate Fuzzy Preorders and Equivalences 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (IEEE Computer Society Publications, 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial