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Alexandroff Manifolds and Homogeneous Continua

Published online by Cambridge University Press:  20 November 2018

A. Karassev
Department of Computer Science and Mathematics, Nipissing University, North Bay, ON, P1B 8L7 e-mail:
V. Todorov
Department of Mathematics, UACG, Sofia, Bulgaria e-mail:
V. Valov
Department of Computer Science and Mathematics, Nipissing University, North Bay, ON, P1B 8L7 e-mail:
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We prove the following result announced by the second and third authors: Any homogeneous, metric $ANR$-continuum is a $V_{G}^{n}$-continuum provided ${{\dim}_{G}}X\,=\,n\,\ge \,1$ and ${{\overset{\vee }{\mathop{H}}\,}^{n}}\left( X;\,G \right)\,\ne \,0$, 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 ${{\overset{\vee }{\mathop{H}}\,}^{n}}\left( X;\,G \right)\,\ne \,0$ for some group $G$ and $n\,\ge \,1$, cannot be separated by a compactum $K$ with ${{\overset{\vee }{\mathop{H}}\,}^{n-1}}\left( K;\,G \right)\,=\,0$ and ${{\dim}_{G}}K\,\le \,n\,-\,1$. 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.

Research Article
Copyright © Canadian Mathematical Society 2014


The first author was partially supported by NSERC Grant 257231-09. The third author was partially supported by NSERC Grant 261914-08.


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