Nearly metacompact spaces

被引:1
|
作者
Grabner, E
Grabner, G
Vaughan, JE
机构
[1] Slippery Rock Univ, Dept Math, Slippery Rock, PA 16057 USA
[2] Univ N Carolina, Dept Math, Greensboro, NC 27412 USA
关键词
metacompact; nearly metacompact; irreducible; countably compact; radial;
D O I
10.1016/S0166-8641(98)00107-2
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A space X is called nearly metacompact (meta-Lindelof) provided that if U is an open cover of X then there is a dense set D subset of or equal to X and an open refinement V of ZA that is point-finite (point-countable) on D. We show that countably compact, nearly meta-Lindelof T-3-spaces are compact. That nearly metacompact radial spaces are meta-Lindelof. Every space can be embedded as a closed subspace of a nearly metacompact space. We give an example of a countably compact, nearly meta-Lindelof T-2-space that is not compact and a nearly metacompact T-2-space which is not irreducible. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
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页码:191 / 201
页数:11
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