Characterizing maximal compact subgroups

Characterizing maximal compact subgroups

We prove that for a compact subgroup $H$ of an almost connected locally compact Hausdorff group $G$, the following properties are mutually equivalent: (1) $H$ is a maximal compact subgroup of $G$, (2) $G/H$ is contractible, (3) $G/H$ is homeomorphic to a Euclidean space, (4) $G/H$ is an AE for parac...

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1. Verfasser: Antonyan, Sergey A
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Mathematics - General Topology
Mathematics - Geometric Topology
Mathematics - Group Theory
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description We prove that for a compact subgroup $H$ of an almost connected locally compact Hausdorff group $G$, the following properties are mutually equivalent: (1) $H$ is a maximal compact subgroup of $G$, (2) $G/H$ is contractible, (3) $G/H$ is homeomorphic to a Euclidean space, (4) $G/H$ is an AE for paracompact spaces, (5) $G/H$ is a $G$-AE for paracompact proper $G$-spaces having a paracompact orbit space.
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Mathematics - Geometric Topology
Mathematics - Group Theory
title Characterizing maximal compact subgroups
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