摘要
对第二纲的仿紧Quarter可层化空间进行了研究,证明了这类空间含有σ闭离散的稠密子集.同时给出了实数集的子集是消去拓扑半群,但是不是Quarter可层化空间.
The second category and paracompact Quarter-stratifiable spaces are stadied. All Quarter-stratifiable spaces have a σ- closed-discrete dense subset if this space is second category and paracompact. In addition, an example is given, which is semisubgroup of R, but not quarter-stratifiable.
出处
《山东大学学报(理学版)》
CAS
CSCD
北大核心
2006年第5期1-3,共3页
Journal of Shandong University(Natural Science)
基金
国家自然科学基金资助项目(10271026和10571151)
山东省自然科学基金资助项目(Y2004A03)