摘要
本文引入半边界,并且进一步研究了半拓扑子集的一些性质,例如十集定理(定理2.6).另外也讨论了子空间,乘积空间和商空间中的半开集.
In this paper, We introduce semi-boundary and further investigate some-properties of semi-topological subsets,for example,ten-set theorem (Th·2·6). In addition, we also discuss the semi-open set of subspaces, product spaces and quoti-ent spaces.
