A NOTE ON MONOTONICALLY STAR LINDELOF SPACES

被引:1
|
作者
Song, Yan-Kui [1 ]
机构
[1] Nanjing Normal Univ, Sch Math Sci, Inst Math, Nanjing 210023, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Star covering properties; star Lindelof; monotonically star Lindelof; COVERING PROPERTIES;
D O I
10.2989/16073606.2017.1306004
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
A space X is mono tonically star Lindelof 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 Lindelof subset of X, and st (s(U); U) = X, and if V refines U then s(U) subset of s(V), where s t (s (U); U) = U{U is an element of U : U boolean AND s(U) not equal empty set}. In this paper, we investigate the relationship between monotonically star Lindel of spaces and related spaces, and also study topological properties of monotonically star Lindelof spaces.
引用
收藏
页码:581 / 588
页数:8
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