Number Theory Web Seminar

This number theory seminar is purely online. Our talks come from various corners of the field and of the world. They are streamed live on Zoom.

Organizers:


There are no fees, but registration is necessary. To register please follow this link.

Registered users will receive an email a few hours before the talk with a link to the Zoom meeting. 

The seminar runs every Thursday. Please note the usual times of the seminar below and in the FAQ Section. 

Talks are usually 50 minutes and then time for some questions.

Contact: ntweb.seminar@gmail.com

YouTube Channel: https://www.youtube.com/@numbertheorywebseminar 

Please consider the following:

Next talk:



Isabel Vogt, Brauer--Manin obstructions requiring arbitrarily many Brauer classes
(Brown University)

Thursday, October 5, 2023 (8am PDT, 11am EDT, 4pm BST, 5pm CEST, 6pm Israel Daylight Time, 8:30pm Indian Standard Time, 11pm CST)
Friday, October 6, 2023 (2am AEDT, 4am NZDT)

Abstract: A fundamental problem in the arithmetic of varieties over global fields is to determine whether they have a rational point.  As a first effective step, one can check that a variety has local points for each place.  However, this is not enough, as many classes of varieties are known to fail this local-global principle.  The Brauer–Manin obstruction to the local-global principle for rational points is captured by elements of the Brauer group. On a projective variety, any Brauer–Manin obstruction is captured by a finite subgroup of the Brauer group.  I will explain joint work that shows that this subgroup can require arbitrarily many generators.  This is joint with J. Berg, C. Pagano, B. Poonen, M. Stoll, N. Triantafillou and B. Viray.


Upcoming talks:

David Masser, Some new elliptic integrals
(University of Basel)

Thursday, October 12, 2023 (8am PDT, 11am EDT, 4pm BST, 5pm CEST, 6pm Israel Daylight Time, 8:30pm Indian Standard Time, 11pm CST)
Friday, October 13, 2023 (2am AEDT, 4am NZDT)


Timothy Browning, When is a random Diophantine equation soluble over $\mathbb{Q}_p$ for all $p$?
(IST Austria)

Thursday, October 19, 2023 (8am PDT, 11am EDT, 4pm BST, 5pm CEST, 6pm Israel Daylight Time, 8:30pm Indian Standard Time, 11pm CST)
Friday, October 20, 2023 (2am AEDT, 4am NZDT)

Abstract: The question in the title is of growing importance in number theory and represents a more tractable staging post than the question of solubility over $\mathbb{Q}$. I'll describe the landscape for various families of varieties, which can be interpreted as a more delicate version of Manin's conjecture, in which one counts rational points of bounded height which lie in the image of adelic points under a  morphism. This leads to more subtle asymptotic behaviours and depends intimately on the geometry of the morphism. This is joint work with Julian Lyczak, Roman Sarapin and Arne Smeets.


Ananth Shankar, TBA
(University of Wisconsin, Madison)

Thursday, October 26, 2023 (8am PDT, 11am EDT, 4pm BST, 5pm CEST, 6pm Israel Daylight Time, 8:30pm Indian Standard Time, 11pm CST)
Friday, October 27, 2023 (2am AEDT, 4am NZDT)

Abstract: TBA


Joseph H. Silverman, TBA
(Brown University)

Thursday, November 2, 2023 (8am PDT, 11am EDT, 3pm GMT, 4pm CET, 5pm Israel Standard Time, 8:30pm Indian Standard Time, 11pm CST)
Friday, November, 2023 (2am AEDT, 4am NZDT)

Abstract: TBA


Jens Marklof, TBA
(University of Bristol)

Thursday, November 9, 2023 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, November 10, 2023 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Henri Darmon, TBA
(McGill University)

Thursday, November 16, 2023 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, November 17, 2023 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Anke Pohl, TBA
(University of Bremen)

Thursday, November 23, 2023 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, November 24, 2023 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Wei Zhang, TBA
(MIT)

Thursday, November 30, 2023 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, December 1, 2023 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Misha Rudnev, TBA
(University of Bristol)

Thursday, December 7, 2023 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, December 8, 2023 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Djordje Milićević, TBA
(Bryn Mawr College)

Thursday, December 14, 2023 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, December 15, 2023 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Zeev Rudnick, A retrospective of some of Peter Sarnak’s work in the past 70 years
(Tel Aviv University)

A talk in honor of Peter Sarnak's 70th birthday

Special Chair: Alex Kontorovich (Rutgers University)


Thursday, December 21, 2023 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, December 22, 2023 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Thomas Tucker, TBA
(University of Rochester)

Thursday, January 25, 2024 (8am PST, 11am EST, 4pm GMT, 5pm CET, 6pm Israel Standard Time, 9:30pm Indian Standard Time)
Friday, January 26, 2024 (12am CST, 3am AEDT, 5am NZDT)

Abstract: TBA


Sponsors:

We gratefully acknowledge the generous support of: