On monotonically star countably compact spaces

被引:0
|
作者
Singh, Sumit [1 ]
机构
[1] Univ Delhi, Dept Math, New Delhi 110007, India
来源
JOURNAL OF ANALYSIS | 2023年 / 31卷 / 02期
关键词
Monotonically star countably compact; Regular closed; Perfect; Star-countably compact; Star-compact; Covering; Star-covering; Topological space;
D O I
10.1007/s41478-022-00507-w
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
A space X is said to be monotonically star countably compact if one assign to for each open cover U a subspace s(U) subset of X, called a kernel, such that s(U) is a countably compact subset of X and St(s(U); U) = X, and if V refines U then s(U) subset of s(V), where St(s(U); U) = boolean OR{U is an element of U : U boolean AND s(U) not equal (empty set}. In this paper, we investigate the relationships between monotonically star countably compact spaces and other related spaces, and also study the topological properties of monotonically star countably compact spaces.
引用
收藏
页码:1113 / 1122
页数:10
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