Topology Seminar
Upcoming Talks
In Fall 2026, the UChicago Algebraic Topology Seminar will meet on Tuesdays at 4:00-5:00PM in TBA 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.
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JD Quigley (University of Virginia)
Exotic representation spheres
An exotic sphere is a smooth manifold which is homeomorphic, but not diffeomorphic, to a sphere with its standard smooth structure. It is an open question whether every exotic sphere admits a smooth nontrivial $\mathbb{Z}/p$-action. I will discuss forthcoming work with Nick Kuhn and Oliver Wang using equivariant and chromatic homotopy theory to obstruct and detect such actions.
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Jiacheng Liang (Johns Hopkins University)
If you have any questions, please contact Nikolai Konovalov, Kiran Luecke, Kirill Magidson, Akhil Mathew, Shauly Ragimov, or Peter May.