• Fuzzy closure relations 

      Ojeda Hernández, Manuel; Cabrera, Inma P.; Cordero, Pablo; Muñoz-Velasco, Emilio Jose (Elsevier, 2022-05-25)
      The concept of closure operator is key in several branches of mathematics. In this paper, closure operators are extended to relational structures, more specifically to fuzzy relations in the framework of complete fuzzy ...
    • Fuzzy closure systems: Motivation, definition and properties 

      Ojeda Hernández, Manuel (Elsevier, 2022-09)
      The aim of this paper is to extend closure systems from being crisp sets with certain fuzzy properties to proper fuzzy sets. The presentation of the paper shows a thorough discussion on the different alternatives that ...