信息表属性约简之间的若干关系

On relations between attribute reducts of information tables

研究信息表绝对属性约简与相对属性约简之间的关系,指出一个绝对属性约简通常只是包含而不一定会是相对属性约简,同时给出相对属性约简不是绝对属性约简的一个充分条件.此外还阐述了绝对属性约简与属性依赖性之间的关系.

We study in this paper relations between absolute and relative attribute reducts of an information table. We point out that an absolute attribute reduct is generally not but contains a relative attribute reduct. Moreover, we present a sufficient condition for a relative reduct not to be an absolute reduct. The relation between absolute reducts and attribute dependency is also discussed.