Topology Seminar
Upcoming Talks
In Fall 2026, the UChicago Algebraic Topology Seminar will meet on Tuesdays at 3:50-4:50PM in Eckhart Hall 206 and will be preceded by a pretalk 3:20-3:50PM (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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Arpon Raksit (Northwestern University)
Synthetic E-infinity rings
The relationship between spectra and sheaves on the moduli stack of formal groups is encoded by a certain category of ''synthetic spectra'', introduced from different perspectives by Pstrągowski and Gheorghe–Isaksen–Krause–Ricka. This talk will describe yet another perspective, how this leads to an accompanying analogue for commutative ring spectra, and the relevance of the latter to the motivic filtration on the topological cyclic homology of commutative ring spectra. Based on joint work with Devalapurkar, Hahn, and Senger.
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Preston Cranford (Northwestern University)
If you have any questions, please contact Nikolai Konovalov, Kiran Luecke, Kirill Magidson, Akhil Mathew, Shauly Ragimov, or Peter May.