Rough sets induced by fuzzy ideals in BCK-Algebras
R. Moradian, Sadegh Khosravi Shoar, Akefe Radfar · Journal of Intelligent & Fuzzy Systems · 2016
In this paper by considering of congruence relations induced by fuzzy ideals, we study rough sets in BCK-algebras. To this purpose we clarify a lower and upper approximations for any subset of X in this algebras. Finally, lower and upper rough ideals with respect to fuzzy ideal μ of X are discussed .