Rough Set Theory Applied To Hyper BCK-Algebra

R. Ameri, R. Moradian, R. A. Borzooei


The aim of this paper is to introduce the notions of lower and upper approximation of a subset of a hyper BCK-algebra with respect to a hyper BCK-ideal. We give the notion of rough hyper subalgebra and rough hyper BCK-ideal, too, and we investigate their properties.


rough set, rough (weak, strong) hyper BCK-ideal, rough hyper subalgebra, regular congruence relation.

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