Northwestern Events Calendar
Oct
30
2025

Pinsky Lecture Series | Alex Lubotzky (Weizmann Institute, Hebrew University)

When: Thursday, October 30, 2025
1:00 PM - 2:00 PM CT

Where: Swift Hall, 107, 2029 Sheridan Road, Evanston, IL 60208 map it

Audience: Faculty/Staff - Student - Post Docs/Docs - Graduate Students

Contact: Antonio Auffinger   (847) 491-5524
tuca@northwestern.edu

Group: Department of Mathematics: Special Events

Category: Lectures & Meetings

Description:

Title:  Group stability and approximation 

Abstract: In this talk, we will show how group stability (the question of whether every "almost" representation is a small deformation of a real one) can be considered a non-commutative version of code testability. We then use it to show a number of non-approximation results by using the high-dimensional expanders and the results of Garland and of Deligne. Based on joint works with Glebsky, Thom, Oppenheim, Bachner, and Dogon. 

 

 

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