Rough approximations in a general approximation space and their fundamental properties

被引:29
作者
Davvaz, B. [1 ]
Mahdavipour, M. [1 ]
机构
[1] Yazd Univ, Dept Math, Yazd, Iran
关键词
rough set; lower approximation; upper approximation; general approximation space;
D O I
10.1080/03081070701250994
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
This paper presents a framework for the study of generalizing the standard notion of rough set approximation space. We propose new definitions of lower and upper approximations, which are basic concepts of the rough set theory. These definitions follow naturally from a particular property on the universe and are called general lower and upper approximations. Properties of general approximations are investigated, and their connections are examined.
引用
收藏
页码:373 / 386
页数:14
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