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$\operatorname{PL}(M)$ admits no Polish group topology

Volume 238 / 2017

Kathryn Mann Fundamenta Mathematicae 238 (2017), 285-295 MSC: Primary 57S05; Secondary 54H15. DOI: 10.4064/fm285-10-2016 Published online: 3 March 2017

Abstract

We show that the group of piecewise linear homeomorphisms of any compact PL manifold does not admit a Polish group topology, using both general results on topologies on groups of homeomorphisms, and results on the algebraic structure of PL homeomorphism groups. The proof also shows that the group of piecewise projective homeomorphisms of $S^1$ has no Polish topology.

Authors

  • Kathryn MannDepartment of Mathematics
    University of California
    Berkeley, CA 94720, U.S.A.
    e-mail

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