The Upper and Lower Approximations in Rough Subgroupoid of a Groupoid
Hatice Taşbozan, İlhan Içen · Moroccan Journal of Pure and Applied Analysis · 2018
Abstract In this article, we introduce the concept of rough subgroupoid of a groupoid as a generalization of a rough subgroup and give some features about the lower and the upper approximations in a groupoid [1]. We give some of the characterization of them.