2003, Vol. X, Núm. 1

Summary

  • Extensions of set functions 

    Ovchinnikov, Sergei V.; Falmagne, Jean-Claude (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2003)
    Article
    Open Access
    We establish a necessary and suficient condition for a function defined on a subset of an algebra of sets to be extendable to a positive additive function on the algebra. It is also shown that this condition is necessary ...

  • Haussdorfness in intutionistic fuzzy topological spaces 

    Gallego Lupiañez, F. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2003)
    Article
    Open Access
    The basic concepts of the theory of intuitionistic fuzzy topological spaces have been defined by D. Çcoker and co-workers. In this paper, we define new notions of Hausdorffness in the intuitionistic fuzzy sense, and obtain ...

  • Combining degrees of impairment: the case of the index of Balthazard 

    Alsina Català, Claudi; Trillas i Gay, Enric; Moraga, Claudio (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2003)
    Article
    Open Access
    Using techniques for modeling indices by means of functional equations and resources from fuzzy set theory, the classical Balthazard index used in order to combine several degrees of impairment is characterized in two ...