On an open problem for definable subsets of covering approximation spaces

被引：0
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作者：
He, Mei [1 ]
Ge, Ying [2 ]
Qian, Jingyu [3 ]
机构：
[1] School Mathematical Science, Huaiyin Normal University, Huaian 223300, China
[2] School of Mathematical Science, Soochow University, Suzhou 215006, China
[3] Department of Mathematics, Yancheng Health Vocational and Technical College, Yancheng 224006, China
来源：
World Academy of Science, Engineering and Technology | 2011年 / 51卷
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页码：1184 / 1186
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