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Author:
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Year:
Volume:
Issue:
Rough Sets in Ordered Semigroups
Author(s):
XIE Xiangyun
Pages:
1
-
4
Year:
2002
Issue:
3
Journal:
JOURNAL OF WUYI UNIVERSITY(NATURAL SCIENCE EDITION)
Keyword:
粗糙集
;
序半群
;
同余
;
理想
;
Abstract:
介绍了序半群中粗糙集的概念,这个概念是一般半群中子集的拓广. 对给定的一个子集,给出了一个序半群的正则同余的关于该子集上下近似的定义,讨论了一些子集的运算和上下近似算子之间的关系,特别是当该子集是理想(左、右理想)时,他们的上下近似也是理想.
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