More on intuitionistic fuzzy sets. (English) Zbl 0685.03037

Continuing earlier papers on intuitionistic fuzzy sets [e.g., the author, ibid. 20, 87–96 (1986; Zbl 0631.03040); the author and G. Gargov, ibid. 31, 343–349 (1989; Zbl 0674.03017)] the author introduces modality-like operators as well as versions of level sets and proves some elementary consequences of these definitions.


03E72 Theory of fuzzy sets, etc.
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[1] Atanassov, K., Intuitionistic fuzzy sets, Fuzzy Sets and Systems, 20, 87-96 (1986) · Zbl 0631.03040
[2] Atanassov, K., Modal and topological operators, defined over intuitionistic fuzzy sets, (Shopov, D., Youth Scientific Contributions Sofia, Vol. 1 (1985)), 18-21, (in Bulgarian)
[3] Atanassov, K., Intuitionistic fuzzy sets, (Sgurev, V., VII ITKR’s Session. VII ITKR’s Session, Sofia, June 1983 (1984), Central Sci. and Techn. Library, Bulg. Academy of Sciences), (in Bulgarian) · Zbl 0597.03033
[4] Atanassov, K.; Stoeva, S., Intuitionistic fuzzy sets, (Proc. of Polish Symp. on Interval and Fuzzy Mathematics. Proc. of Polish Symp. on Interval and Fuzzy Mathematics, Poznan (Aug. 1983)), 23-26 · Zbl 0597.03033
[5] Kaufmann, A., Introduction à la Theorie des Sous-ensembles Flous (1977), Masson: Masson Paris-New York · Zbl 0346.94002
[6] Rasiowa, H.; Sikorski, R., The Mathematics of Metamathematics (1963), Polish Academy of Sciences: Polish Academy of Sciences Warszawa · Zbl 0122.24311
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