%0 Journal Article %A Songlin Yang and Ying Ge %D 2010 %J International Journal of Mathematical and Computational Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 37, 2010 %T Remarks on Some Properties of Decision Rules %U https://publications.waset.org/pdf/10029 %V 37 %X This paper shows that some properties of the decision rules in the literature do not hold by presenting a counterexample. We give sufficient and necessary conditions under which these properties are valid. These results will be helpful when one tries to choose the right decision rules in the research of rough set theory. %P 178 - 181