A Further Investigation to Relative Reducts of Decision Information Systems

摘要

In practical situations, there are many definitions of relative reducts with respect to different criterions, but researchers don't notice their application backgrounds, and less efforts have been done on investigating the relationship between them. In this paper, we first discuss the relationship between these relative reducts and present the generalized relative reduct. Then we investigate the relationship between several dis-cernibility matrixes and present the generalized discernibility matrix and discernibility function. Finally, we employ several examples to illustrate the related results accordingly.