k-systems, k-networks and k-covers

被引：0

作者：

Jinjin Li

Shou Lin

机构：

[1] Zhangzhou Teachers’ College,Department of Mathematics

[2] Fujian Normal University,Department of Mathematics

[3] Ningde Teachers College,Department of Mathematics

来源：

Czechoslovak Mathematical Journal | 2006年 / 56卷

关键词：

-systems; -networks; -covers; -spaces; point-countable families; hereditarily closure-preserving families;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The concepts of k-systems, k-networks and k-covers were defined by A. Arhangel’skii in 1964, P. O’Meara in 1971 and R. McCoy, I. Ntantu in 1985, respectively. In this paper the relationships among k-systems, k-networks and k-covers are further discussed and are established by mk-systems. As applications, some new characterizations of quotients or closed images of locally compact metric spaces are given by means of mk-systems.

引用

页码：239 / 245

页数：6

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