The lower and upper approximations in a fuzzy group

Information Sciences

Volumn 90, Issue 1-4, 1996, Pages 203-220

  Kuroki, Nobuaki ^a   Wang, Paul P ^b  

^a JOETSU UNIVERSITY OF EDUCATION   (Japan)

^b Duke University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; ARTIFICIAL INTELLIGENCE; EQUIVALENCE CLASSES; SET THEORY;

FUZZY GROUP; LOWER APPROXIMATION; UPPER APPROXIMATION;

FUZZY SETS;

EID: 0030127824     PISSN: 00200255     EISSN: None     Source Type: Journal    
DOI: 10.1016/0020-0255(95)00282-0     Document Type: Article

References (7)

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3. T. Iwinski, Algebraic approach to rough sets, Bull. Polish Acad. Sci. Math. 35:673-683 (1987).
4. N. Kuroki, Fuzzy congruences and fuzzy normal subgroups, Inform. Sci. 60:247-259 (1992).
5. Z. Pawlak, Rough sets, Int. J. Inf. Comp. Sci. 11:341-356 (1982).
6. Z. Pawlak, Rough Sets Theoretical Aspects of Reasoning about Data, Kluwer Academic, Norwell, MA, 1991.
7. J. Pomykala and J. A. Pomykala, The stone algebra of rough sets, Bull. Polish Acad. Sci. Math. 36:495-508 (1988).