TY - JFULL AU - Songlin Yang and Ying Ge PY - 2010/2/ TI - Remarks on Some Properties of Decision Rules T2 - International Journal of Mathematical and Computational Sciences SP - 177 EP - 181 VL - 4 SN - 1307-6892 UR - https://publications.waset.org/pdf/10029 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 37, 2010 N2 - 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. ER -