推广了一般二元关系下粗糙集的定义。讨论了该定义下粗糙集的一些性质,证明了二元系R在满足一定条件时.粗糙集的上、下近似分别是某个拓扑空间的闭包和内部算子.
The paper generalizes the definition of the rough sets model under general binary relation, studies some properties, proves that the lower and upper approximations are interior and closure operators of a topological space respectively when the binary relation R has some properties.