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Given a topological group G , one may be interested in understanding its possible minimal actions. This can be partially achieved by calculating the universal minimal flow (UMF) of G. The UMF is the (unique) G-minimal system which factors onto all G-minimal systems. Answering a question of Uspenskij (2000), we prove that if X is a closed manifold of dimension 2 or higher or the Hilbert cube, then the universal minimal flow of Homeo(X), the group of homeomorphisms of X equipped with the compact-open topology, is not metrizable.
This is joint work with Todor Tsankov and Andy Zucker.