• Fuzzy approximation relations, modal structures and possibilistic logic 

      Esteva Massaguer, Francesc; Garcia, Pere; Godo Lacasa, Lluís; Rodríguez, Ricardo Óscar (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1998)
      Article
      Accés obert
      The paper introduces a general axiomatic notion of approximation mapping, a mapping that associates to each crisp proposition p a fuzzy set representing "approximately p". It is shown how it can be obtained through fuzzy ...
    • Using fuzzy similiarity relations to revise and update a knwoledge base 

      Rodríguez, Ricardo Óscar; Garcia, Pere; Godo Lacasa, Lluís (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1996)
      Article
      Accés obert
      Similarity-based models were first used by Ruspini to give semantics to fuzzy logic ([7]). In these models, incomplete information is represented by an evidential set, i.e. a set of possible worlds that are compatible ...