Small-homeomorphism compact-subgroup conjecture

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

{ϕHomeo(M)d(x,ϕ(x))<ϵ for all xU}.\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.

Sources & referencesView supporting material

Primary source

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

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