On covering rough sets

Authors:
Keyun Qin;Yan Gao;Zheng Pei
Affiliations:
Department of Mathematics, Southwest Jiaotong University, Chengdu, Sichuan, China;College of Computer Science and Technology, Henan Polytechnic University, Jiaozuo, Henan, China;School of Mathematics & Computer Science, Xihua University, Chengdu, Sichuan, China
Venue:
RSKT'07 Proceedings of the 2nd international conference on Rough sets and knowledge technology
Year:
2007

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Abstract

This paper is devoted to the discussion of extended covering rough set models. Based on the notion of neighborhood, five pairs of dual covering approximation operators were defined with their properties being discussed. The relationships among these operators were investigated. The main results are conditions with which these covering approximation operators are identical.