关于弱aD-空间的有限并 |
| |
引用本文: | 任亮英,刘宛昀,周丽.关于弱aD-空间的有限并[J].齐齐哈尔轻工业学院学报,2010(4):92-94. |
| |
作者姓名: | 任亮英 刘宛昀 周丽 |
| |
作者单位: | 成都理工大学信息管理学院,成都610059 |
| |
摘 要: | 研究了弱aD-空间的有限并,获得了如下结果:(1)如果X是亚紧空间,X=Y∪Z,其中Y是亚Lindelof空间,Z是弱aD-空间,则X是弱aD-空间;(2)如果X是亚紧空间,X=Y∪Z,其中Y是亚Lindelof空间,Z是弱aD-空间,则X是aD-空间,也是bD-空间;(3)如果亚紧空间X是亚Lindelof空间有限族{X i,i=1,,i}的并,则X是aD-空间,也是bD-空间。
|
关 键 词: | D-空间 弱aD-空间 亚Lindelof空间 |
On finite unions of weakly-aD spaces |
| |
Authors: | REN Liang-ying LIU Wan-yun ZHOU Li |
| |
Affiliation: | (College of Information Management,Chengdu University of Technology,Chengdu 610059,China) |
| |
Abstract: | In this paper,we study finite unions of weakly aD-spaces and get the following results:(1) If a metacompac X=Y∪Z,whereY is a metaLindelof space and Z is a weakly aD-space,then X is a weakly aD-spaces.(2)If metacompact X=Y∪Z,whereY is a metaLindelof space and Z is a weakly aD-spaces,then is X an aD -spaces,and it is also a bD-spaces.(3) If a metacompact X is the union of a finite collection {X i,i=1,,i}of metaLindelof spaces,then X is an aD-spaces,and it is also a bD-spaces. |
| |
Keywords: | D-spaces weakly aD-spaces metaLindelof spaces |
本文献已被 维普 等数据库收录! |
|