• 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 ...
    • Quasi-closed elements in fuzzy posets 

      Ojeda Hernández, Manuel; Cabrera, Inma P.; Cordero, Pablo (ELSEVIER, 2022-04)
      We generalize the notion of quasi-closed element to fuzzy posets in two stages: First, in the crisp style in which each element in a given universe either is quasi-closed or not. Second, in the graded style by defining ...