The unramified Eisenstein spectrum
Andrei Okounkov (Columbia University)
Abstract: I will report on joint work with David Kazhdan, in which we determine the unramified Eisenstein spectrum for all split reductive groups over a global field. Our methods are rooted in topology and algebraic geometry. Specifically, we relate the spectral decomposition to a decomposition of $T^*(B \backslash G / B)$ in in a certain cobordism group, where $G$ is the Langlands dual group. This works equally well for fields of positive and zero characteristic.
algebraic geometry
Audience: researchers in the topic
ZAG (Zoom Algebraic Geometry) seminar
Series comments: Description: ZAG seminar
The seminar takes place on Tuesdays and Thursdays via Zoom. Zoom passwords are given via mailing list on Fridays. To join the mailing list go to the website.
If you use a calendar system, you can see the individual seminars at bit.ly/zag-seminar-calendar
Times vary to accommodate speakers time zones but times will be announced in GMT time.
| Organizers: | Jesus Martinez Garcia*, Ivan Cheltsov*, Jungkai Chen, Jérémy Blanc, Ernesto Lupercio, Yuji Odaka, Zsolt Patakfalvi, Julius Ross, Cristiano Spotti, Chenyang Xu |
| *contact for this listing |