基于半群中的粗糙左理想,粗糙右理想,粗糙双侧理想与粗糙双理想的概念,本文讨论了半群在变精度的粗糙集模型下,各种粗理想相应的性质,并且讨论了半群中两个理想之积的一些性质,进一步丰富了半群中的粗糙集理论.
Based on the variable precision rough set model and the notions of the rough left ideal,rough right ideal,rough two.sided ideal and rough bi-ideal in a semigroups,this article disscuss some properties of rough ideal and the product of two ideals in a semigroup.Thus it enrich the rough theory in semigroups.