节点文献
粗糙S-子系
Roughness in S-subacts
【摘要】 引入S-系的上、下近似算子,定义了粗糙S-子系的概念,讨论了S-系的子集在上下近似算子作用下的性质,并讨论了S-系直积的上、下近似集的性质.
【Abstract】 The notations of upper(resp.lower) approximation operators on S-acts and the concept of rough S-subact with a congruence on an S-act A are introduced.Some properties of S-subacts acted by upper or lower approximation operators are given.Also some properties of S-subacts which are a direct product of some two S-acts are discussed.
【关键词】 S-系;
粗糙S-子系;
直积;
上近似集;
下近似集;
【Key words】 S-act; rough S-subact; direct product; upper approximation set; lower approximation set;
【Key words】 S-act; rough S-subact; direct product; upper approximation set; lower approximation set;
【基金】 国家自然科学基金资助项目(10341002);广东省自然科学基金资助项目(0501332);广东省教育厅自然科学基金资助项目(Z03070);广东省教育厅“千百十工程”优秀人才基金资助项目(Q校02050)
- 【文献出处】 五邑大学学报(自然科学版) ,Journal of Wuyi University(Natural Science Edition) , 编辑部邮箱 ,2008年01期
- 【分类号】TP182
- 【下载频次】19