Small-homeomorphism compact-subgroup conjecture

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Let MM be a connected nn-manifold with metric dd, and let U⊆MU\subseteq M be open. For ϵ>0\epsilon>0, consider the subset

{ϕ∈Homeo⁡(M)∣d(x,ϕ(x))<ϵ for all x∈U}.\left\{\phi\in\operatorname{Homeo}(M)\bigm|d(x,\phi(x))<\epsilon\text{ for all }x\in U\right\}.

Small-homeomorphism compact-subgroup conjecture. There exists ϵ>0\epsilon>0 such that this subset of Homeo⁡(M)\operatorname{Homeo}(M) contains no nontrivial compact subgroup. For any specific manifold MM, this is presented as a reformulation of the Hilbert–Smith conjecture. Its status therefore follows the status of that reformulation, but no separate resolution is supplied for the general statement.

References

Primary source

John Pardon, “The Hilbert–Smith conjecture for three-manifolds”, arXiv:1112.2324 (2013).

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