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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.

MSC:
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, (), 18-21, (in Bulgarian)
[3] Atanassov, K., Intuitionistic fuzzy sets, (), (in Bulgarian) · Zbl 0597.03033
[4] Atanassov, K.; Stoeva, S., Intuitionistic fuzzy sets, (), 23-26 · Zbl 0597.03033
[5] Kaufmann, A., Introduction √† la theorie des sous-ensembles flous, (1977), Masson Paris-New York · Zbl 0346.94002
[6] Rasiowa, H.; Sikorski, R., The mathematics of metamathematics, (1963), Polish Academy of Sciences Warszawa · Zbl 0122.24311
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