Rigidity of commensurators and applications

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Rigidity of commensurators and applications

김수현 0 1123
구분 DASOM
일정 2026-06-09(화) 13:30~14:30
세미나실 129동 301호
강연자 Van Limbeek (University of Illinois Chicago)
담당교수 임선희
기타
I will discuss a question raised independently by Greenberg and Shalom: Can an infinite discrete subgroup of a simple Lie group have dense commensurator and not be an arithmetic lattice? I will explain the surprising connections between this question and other long-standing open problems, and discuss recent progress on special cases of the question. Joint work with (subsets of) Brody, Fisher, and Mj.

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