Coset spaces and cardinal invariants

被引:0
|
作者
M. Fernández
I. Sánchez
M. Tkachenko
机构
[1] Universidad Autónoma de la Ciudad de México,Academia de Matemáticas
[2] Universidad Autónoma Metropolitana,Departamento de Matemáticas
来源
Acta Mathematica Hungarica | 2019年 / 159卷
关键词
topological group; coset space; neutral subgroup; feathered group; character; -character; weight; -weight; metrizability; submetrizability; primary 22A05; 54A25; 54B15; secondary 54E15; 54H11;
D O I
暂无
中图分类号
学科分类号
摘要
We present an example of a closed subgroup H of a topological group G such that the quotient space G/H is compact, first-countable, and satisfies πw(G/H)<w(G/H)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\pi}w(G/H) < w(G/H)$$\end{document}. We show that if H is a closed neutral subgroup of a topological group G such that G/H has countable character (pseudocharacter), then G/H is metrizable (submetrizable).
引用
收藏
页码:486 / 502
页数:16
相关论文
共 50 条
  • [1] COSET SPACES AND CARDINAL INVARIANTS
    Fernandez, M.
    Sanchez, I.
    Tkachenko, M.
    [J]. ACTA MATHEMATICA HUNGARICA, 2019, 159 (02) : 486 - 502
  • [2] Cardinal invariants of coset spaces
    Ling, Xuewei
    He, Wei
    Lin, Shou
    [J]. TOPOLOGY AND ITS APPLICATIONS, 2021, 299
  • [3] Real double coset spaces and their invariants
    Helminck, Aloysius G.
    Schwarz, Gerald W.
    [J]. JOURNAL OF ALGEBRA, 2009, 322 (01) : 219 - 236
  • [4] Submaximal spaces and cardinal invariants
    Corral, Cesar
    [J]. TOPOLOGY AND ITS APPLICATIONS, 2022, 314
  • [5] CARDINAL INVARIANTS OF SPACES OF MAPPINGS
    KRIVORUC.AI
    [J]. DOKLADY AKADEMII NAUK SSSR, 1973, 213 (01): : 34 - 37
  • [6] NEW CARDINAL INVARIANTS FOR TOPOLOGICAL SPACES
    MEYER, PR
    [J]. NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1970, 17 (01): : 116 - &
  • [7] Cardinal invariants of monotonically normal spaces
    Gartside, PM
    [J]. TOPOLOGY AND ITS APPLICATIONS, 1997, 77 (03) : 303 - 314
  • [8] Cardinal invariants of dually CCC spaces
    Xuan, Wei-Feng
    Song, Yan-Kui
    [J]. TOPOLOGY AND ITS APPLICATIONS, 2021, 296
  • [9] ON CARDINAL INVARIANTS OF LINKED SYSTEMS SPACES
    MAHMOUD, T
    [J]. VESTNIK MOSKOVSKOGO UNIVERSITETA SERIYA 1 MATEMATIKA MEKHANIKA, 1995, (04): : 14 - 19
  • [10] Cardinal invariants of cellular-Lindelof spaces
    Bella, Angelo
    Spadaro, Santi
    [J]. REVISTA DE LA REAL ACADEMIA DE CIENCIAS EXACTAS FISICAS Y NATURALES SERIE A-MATEMATICAS, 2019, 113 (03) : 2805 - 2811