Nielsen realization for aspherical closed manifolds with hyperbolic fundamental group
Nielsen realization for aspherical closed manifolds with hyperbolic fundamental group
Let be an aspherical closed manifold with hyperbolic fundamental group . Let be an embedding of a finite group into the outer automorphism group of . Let denote the group of self-homeomorphisms of , and let be the canonical map induced by the action on the fundamental group. Nielsen realization conjecture. There is an effective topological -action on such that
This asserts that every finite subgroup of the outer automorphism group of a hyperbolic fundamental group is realized by an effective topological action on the corresponding aspherical closed manifold. The source notes that, to the authors' knowledge, there is no counterexample; the general status is not established here.
Sources & referencesView supporting material
Primary source
Wolfgang Lueck, “On Brown's Problem, Poincare' models for the classifying spaces for proper actions and Nielsen Realization”, arXiv:2201.10807 (2022).
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