【摘要】 在广义近似空间(U,R)中，定义并研究了R的P-闭包(核),其中P为某种或某类性质(如反身、传递、对称、预序等)。结合(U,R)诱导的拓扑结构，给出了几类P-闭包的拓扑表示。更多还原

【Abstract】 In the theory of generalized approximate space(U,R), we define and study the P-closures(kernels) of binary relation R, where Prepresents one property or a class of properties(such as reflexivity, transitivity, symmetry, preorder, etc.). Then, by incorporating the topology induced by generalized approximate space(U,R), we give the topological representations of some P-closures.更多还原