Rough Set Theoretic and Logical Study of Some Approximation Pairs Due to Pomykala

摘要

The paper inquires about the relationships among the rough set theoretic and modal properties based on lower and upper approximation operators corresponding to approximation pairs introduced by Pomykala viz. P_2 and P3. It also explores Rough Modus Ponens Rules with respect to Systems corresponding to P_2 and P3 and discusses about Rough Logics based on these Rough Modus Ponens rules.