关键词: 粗糙集 上近似集 下近似集 核

Abstract:

Attribute reduction is considered one of the most important contents of the rough set theory, and core obtaining plays an essential role in attribute   reduction. This paper proposes an algorithm for finding the core based on binary operation,and the algorithm is simple and easy-to-be-implemented. The v  alidity of the algorithm is proved by C programming.

Key words: （rough set, upper approximation set, lower approximation set;core）