ABSTRACT

The idea of rough set consist the approximation of a set by pair of sets called the lower and the upper approximation of the set. In fact, these approximations are interior and closer operations in a certain topology generated by available data about elements of the set. The rough set is based on knowledge of an agent about some reality and his ability to discern some phenomenon processes etc. Thus this approach is based on the ability to classify data obtained from observation, measurement, etc. In this paper we define the dependency of knowledge through the axiomatic approach instead of the traditional (Pawlak) method of rough set.