Upcoming Talks

In Spring 2026, the UChicago Algebraic Topology Seminar will meet on Tuesdays at 4:00-5:00PM in Eckhart Hall 206 and will be preceded by a pretalk 3:30-4PM (unless otherwise noted).

To receive emails about the seminar, please email Nikolai Konovalov requesting to be subscribed to our mailing list.

• • Apr 282026

  Christian Kremer (MPIM)

  The Nielsen Realisation Problem for high--dimensional aspherical manifolds

  The classical Nielsen Realisation Problem asks whether a finite subgroup of the mapping class group of a surface can be realised by an actual group action on the surface. It was answered affirmatively by Kerckhoff. In my talk, I will present a generalisation of this problem to high-dimensional aspherical manifolds, and discuss results for group actions of cyclic groups of prime order, based on the newly developed technique of equivariant and isovariant Poincaré duality.

• • May 052026

  Kenny Schefers (UC Berkeley)

• • May 122026

  Piotr Pstrągowski (University of Washington)

• • May 192026

  Kirill Magidson (Northwestern University)

If you have any questions, please contact Sanath Devalapurkar, Nikolai Konovalov, Akhil Mathew, Tomer Schlank, or Peter May.