We introduce dynamic reducts in object oriented information system using rough set theory. To develop dynamic reducts in object oriented information system using rough set theory, we propose object-oriented information system into rough set models. To accomplish this, we construct the class, object, and name structures using rough set theory. Next, combining class, name and object structures, we propose object-oriented information systems. Moreover, we introduce indiscernibility relations on the set of objects, lower and upper approximations, and object-oriented rough sets in the object-oriented information systems and we introduce the concept of object oriented reducts, object oriented reducts using indiscenibility matrix.
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