English

Automatic continuity for homeomorphism groups of noncompact manifolds

Geometric Topology 2020-03-04 v1

Abstract

We extend the proof of automatic continuity for homeomorphism groups of manifolds to non-compact manifolds and manifolds with marked points and their mapping class groups. Specifically, we show that, for any manifold MM homeomorphic to the interior of a compact manifold, and a set XMX \subset M homeomorphic to the union of a Cantor set and finite set, the relative homeomorphism group Homeo(M,X)\mathrm{Homeo}(M, X) and the mapping class group Homeo(M,X)/Homeo0(M,X)\mathrm{Homeo}(M, X)/\mathrm{Homeo}_0(M,X) have the property that any homomorphism from such a group to any separable topological group is necessarily continuous.

Keywords

Cite

@article{arxiv.2003.01173,
  title  = {Automatic continuity for homeomorphism groups of noncompact manifolds},
  author = {Kathryn Mann},
  journal= {arXiv preprint arXiv:2003.01173},
  year   = {2020}
}
R2 v1 2026-06-23T14:01:06.793Z