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
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页码:1113 / 1122
页数:10
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