Algebra Seminar
(Mon 3:30-4:30pm, Kap 265)
Organizer: Cris Negron
Topics include (but are not limited to):
Algebra, representation theory, algebraic and arithmetic geometry, homotopy theory, and mathematical physics.
Spring 2025
| Date | Location | Speaker | Abstract |
|---|---|---|---|
| Sept 8 | Yifeng Huang (USC) | Coh zeta functions for quadratic orders Abstract: The Coh zeta function, a 1/|Aut|-weighted count of a ring's finite modules, is a basic invariant that unifies problems in enumerative algebra such as counting matrices and representations. While these zeta functions for (germs of) singular curves have revealed surprising connections to q-series, making precise predictions has remained challenging. This talk provides a unified picture for the known y2=xn singularities by re-interpreting them as quadratic orders: ramified for odd n and split for even n. This algebraic viewpoint reveals a crucial missing piece in the landscape---the inert quadratic orders---which is necessary to complete the picture (via quadratic twists), and is the focus of the new work. |
|
| Sept 15 | Vesselin Dimitrov (CalTech) | ||
| Sept 22 | Anton Kapustin (CalTech) | ||
| Sept 29 [organizer away] |
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| Oct 6 [organizer away] |
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| Oct 13 | Davide Passaro (CalTech) | ||
| Oct 20 | |||
| Oct 27 | |||
| Nov 3 | Sam Qunell (UCLA) | ||
| Nov 10 | Mark Walker (U Nebraska) | ||
| Nov 17 | Matt Young (Utah State) | ||
| Nov 24 | pre-Holiday | ||
| Dec 1 |
Mailing list: Contact me if you want to be added to the seminar mailing list.
See our friends at the Geometry seminar (M 2:00 pm) and the Combinatorics seminar (W 2:00 pm).