引入L-余覆盖广义粗集的概念,证明研究该广义粗集的上、下近似与研究L-余拓扑的余子基生成的闭包和内部是等价的,并且以此为基础,讨论该广义粗集的性质。
This paper presents a notion of generalized rough sets based on L-co-covers. At first, the equivalence in the studying of the upper (resp. , lower) approximation operators on this generalized rough sets and the closure (resp. , interior) operators generated by the co-subbases of L-co-topological is proved, and then the properties of this generalized rough sets are researched by the above equivalence.