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Speaker:

Mihail Arabadji
Affiliation:

UMass Amherst/MPIM
Date:

Thu, 01/06/2023 - 10:30 - 11:30
Location:

MPIM Lecture Hall
Parent event:

Low-dimensional topology seminar Contact: Aru Ray (aruray @ mpim-bonn.mpg.de)

We are going to show that there are many families of non-spin 4–manifolds for which the smooth Nielsen realization problem fails; that is, there are (finite) subgroups of their mapping class groups that cannot be realized by a group of diffeomorphisms. This extends and complements the recent results for spin 4–manifolds. This is joint work with Inanc Baykur.

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