应用粗糙集理论给出m-半格上由模糊(素)理想诱导的同余及关于这种同余上(下)粗糙模糊近似算子的性质.通过引入m-半格粗糙模糊(素)理想的概念,讨论了m-半格上粗糙模糊(素)理想与模糊(素)理想的关系及粗糙模糊(素)理想与(素)理想的关系.
Using rough set theory, we proposed the congruences induced by fuzzy (prime) ideals of an m-semilattice and studied the properties of the upper (lower) rough fuzzy approximation operators with respect to these congruences. Then we introduced the notions of rough fuzzy (prime) ideals of m-semilattices, and established the relationships between rough fuzzy (prime) ideals and fuzzy (prime) ideals and the relationships between rough fuzzy (prime) ideals and (prime) ideals of m-semilattices.