Fuzzy rough set models over two universes using textures

DİKER M., Ugur A. A.

FUZZY SETS AND SYSTEMS, vol.442, pp.155-195, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 442
  • Publication Date: 2022
  • Doi Number: 10.1016/j.fss.2021.10.014
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Communication Abstracts, Computer & Applied Sciences, INSPEC, zbMATH
  • Page Numbers: pp.155-195
  • Keywords: Fuzzy direlation, Fuzzy rough set, Serial fuzzy relation, Serial fuzzy inverse relation, Texture, SPACES, UNCERTAINTY, OPERATORS
  • Hacettepe University Affiliated: Yes


The purpose of this paper is twofold: firstly, to exhibit the existence of a reasonable connection between fuzzy relations and (textural) fuzzy direlations in terms of fuzzy logical connectives; and secondly, to give a new perspective with respect to approximation operators due to fuzzy rough set models over two universes using textures. To this end, we investigate the serialities of fuzzy relations in terms of fuzzy logic connectives using fuzzy direlations. For different fuzzy logic systems, we show that the textural serialities provide alternative descriptions of the serialities of a fuzzy relation in terms of parameters. Without considering the motivation of the semantic link with the classical Pawlak rough sets, we obtain and discuss the natural fuzzifications of rough set models over two universes. Further, we execute that a textural fuzzy rough set model is an efficient template for the basic properties of the various fuzzy rough set models over two universes. For instance, we prove that the revised fuzzy rough set approximations with two universes are the natural extensions of the loose and tight approximations of De Cock et al.(c) 2021 Elsevier B.V. All rights reserved.