Alexandroff Manifolds and Homogeneous Continua

被引:2
作者
Karassev, A. [1 ]
Todorov, V. [1 ]
Valov, V. [2 ]
机构
[1] Nipissing Univ, Dept Comp Sci & Math, North Bay, ON P1B 8L7, Canada
[2] UACG, Dept Math, Sofia, Bulgaria
来源
CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES | 2014年 / 57卷 / 02期
基金
加拿大自然科学与工程研究理事会;
关键词
Cantor manifold; cohomological dimension; cohomology groups; homogeneous compactum; separator; V-n-continuum;
D O I
10.4153/CMB-2013-010-8
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We prove the following result announced by the second and third authors: Any homogeneous, metric ANR-continuum is a V-G(n)-continuum provided dim(G) X = n >= 1 and H-n(X;G) not equal 0, where G is a principal ideal domain. This implies that any homogeneous n-dimensional metric ANR-continuum is a V-n-continuum in the sense of Alexandroff. We also prove that any finite-dimensional cyclic in dimension n homogeneous metric continuum X, satisfying H-n(X;G) not equal 0 for some group G and n >= 1, cannot be separated by a compactum K wit Hn-1 (K; G) = 0 and dim(G) K <= n - 1. This provides a partial answer to a question of Kallipoliti-Papasoglu as to whether a two-dimensional homogeneous Peano continuum can be separated by arcs.
引用
收藏
页码:335 / 343
页数:9
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