Representing a profinite group as the homeomorphism group of a continuum

preprint2011arXivOpen access

Abstract

We contribute some information towards finding a general algorithm for constructing, for a given profinite group, GG, a compact connected space, XX, such that the full homeomorphism group, H(X)H(X), with the compact-open topology is isomorphic to GG as a topological group. It is proposed that one should find a compact topological oriented graph ΓΓ such that G≅Aut(Γ)G\cong Aut(Γ). The replacement of the edges of ΓΓ by rigid continua should work as is exemplified in various instances where discrete graphs were used. It is shown here that the strategy can be implemented for profinite monothetic groups GG.

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