摘要
胡庆平利用半开集提出了s-分离性的概念．本文对s_1-空间(i=o,1,2,3,4)的特征及S_1-空间成为T_1的条件进行初步探讨,得到一些有趣的结果．
Hu Qingping introduced the concepts of S-seperability by semi-open sets. In this paper, we discuss the features of Sptopological spaces (i = 0,1,2,3,4) and the conditi-ons that an Si-topological space is a Ti-topological space, and obtain some interesting re-sults.
出处
《黑龙江大学自然科学学报》
CAS
1991年第2期32-34,41,共4页
Journal of Natural Science of Heilongjiang University
关键词
半开集
半闭集
半闭包
Si-空间
Semi-open set, semi-colosed set, semi-closure, S_i-topological space.
