Rough ideals in semigroups

Information Sciences

Volumn 100, Issue 1-4, 1997, Pages 139-163

  Kuroki, Nobuaki ^a  

^a JOETSU UNIVERSITY OF EDUCATION   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; EQUIVALENCE CLASSES; LEARNING SYSTEMS; LINEAR ALGEBRA;

FUZZY CONGRUENCES; ROUGH SUBGROUPS;

FUZZY SETS;

EID: 0031206635     PISSN: 00200255     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0020-0255(96)00274-5     Document Type: Article

References (9)

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3. J. M. Howie, An Introduction to Semigroup Theory, Academic Press, New York, 1976.
4. J. Iwinski, Algebraic approach to rough sets, Bull. Polish Acad. Sci. Math. 35:673-683 (1987).
5. N. Kuroki, Fuzzy congruences and fuzzy normal subgroups, Inform. Sci. 60:247-259 (1992).
6. N. Kuroki and P. P. Wang, The lower and upper approximations in a fuzzy group, Inform. Sci. 90:203-220 (1996).
7. Z. Pawlak, Rough sets, Int. J. Inform. Comp. Sci. 11:341-356 (1982).
8. Z. Pawlak, Rough Sets - Theoretical Aspects of Reasoning about Data, Kluwer Academic, Norwell, MA, 1991.
9. J. Pomykala and J. A. Pomykala, The stone algebra of rough sets, Bull. Polish Acad. Sci. Math. 36:495-508 (1988).