Listar por autor "Chasco Ugarte, María Jesús"
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Aggregation of fuzzy subgroups.
Bejines-López, Carlos
; Chasco Ugarte, María Jesús; Elorza, Jorge (Elsevier, 2020-06-02)
Given an aggregation function, and two fuzzy subgroups of a group, this study investigates whether the aggregation of them is also a fuzzy subgroup. It is proven that if the cardinal of the group is a prime power, then it ... -
Aggregation of indistinguishability operators.
Bejines-López, Carlos; Ardanza Trevijano, Sergio; Chasco Ugarte, María Jesús; Elorza, Jorge (Elsevier, 2021-05-04)
The paper studies the aggregation of pairs of T-indistinguishability operators. More concretely we address the question whether is a T-indistinguishability operator if are T-indistinguishability operators. The answer ... -
Preserving fuzzy subgroups and indistinguishability operators
Bejines-López, Carlos; Chasco Ugarte, María Jesús; Elorza, Jorge; Recasens, Jordi (Elsevier, 2018)
In this paper we study the class of all fuzzy subgroups defined with respect to a given t-norm on a fixed group. We find necessary and sufficient conditions over two t-norms to guarantee that the class of all fuzzy subgroups ... -
The number of t-norms on some special lattices
Bejines-López, Carlos; Chasco Ugarte, María Jesús; Elorza, Jorge; Janis, Vladimir; Brutenicova, Michaela (Elsevier, 2020)
We estimate the number of triangular norms on some classes of finite lattices. One of them is obtained from two chains by identifying their zero elements, unit elements and an atom. Another one is the set of the dual ...