Algebra and Algebraic Geometry Seminar Spring 2021

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The Virtual Seminar will take place on Fridays at 2:30 pm via Zoom. We will also link to relevant or interesting Zoom talks outside of the seminar.

Algebra and Algebraic Geometry Mailing List

  • Please join the AGS mailing list by sending an email to to hear about upcoming seminars, lunches, and other algebraic geometry events in the department (it is possible you must be on a math department computer to use this link).

COVID-19 Update

As a result of Covid-19, the seminar for this semester will be held virtually. The default Zoom link for the seminar is (sometimes we will have to use a different meeting link, if Michael K cannot host that day).

Spring 2021 Schedule

date speaker title link to talk
January 29 Nir Avni (Northwestern) First order rigidity for higher rank lattices Zoom link
February 12 Marian Aprodu (Bucharest) TBA Zoom link
March 5 Eyal Subag (Bar Ilan - Israel) TBA Zoom link
April 23 Gurbir Dhillon (Yale) TBA Zoom link


January 29: Nir Avni

Title: First order rigidity for higher rank lattices.

Abstract: I'll describe a new rigidity phenomenon for lattices in higher rank simple algebraic groups. Specifically, I'll explain why the first order theories of such groups do not have (finitely generated) deformations and why they are determined (in the class of finitely generated groups) by a single first order axiom.

The results are from joint works with Alex Lubotzky and Chen Meiri.

Marian Aprodu



Eyal Subag



Gurbir Dhillon