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    • Characterizing Ordered Semigroups by Means of Intuitionistic Fuzzy Bi-ideals 

      Hong, Yongfa; Xu, Ruiping; Fang, Xianwen (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
      Open Access
      In this paper, we endow set S with the structure of an ordered semigroup and define “intuitionistic fuzzy” analogous for several notions that have been proved to be useful in the theory of ordered semigroups and give some ...