- Institut
- Webseiten im Uni-Auftritt
- Zur Startseite
- Forschung
- Konferenzen und Workshops
- Seminare
- Lehre
- Service
- IT
- Zur Startseite
- Dokumentation
- Service und Webdienste
- Software etc.
- E-Mail am Institut (nur alte Accounts)
- E-Mail an der Universität
Termin: Detail
Robin Tucker-Drob - Amenable subrelations of treed equivalence relations and the Paddle-ball lemma
Ort: Paulinum P-801
We give a comprehensive structural analysis of amenable subrelations of a treed measure-class-preserving equivalence relation. The main philosophy is to understand the behavior of the Radon-Nikodym cocycle in terms of the geometry of the amenable subrelation within the treeing. This allows us to extend structural results that were previously only known in the measure-preserving setting, e.g., we show that every nowhere smooth amenable subrelation is contained in a unique maximal amenable subrelation. Two of the main ingredients are an extension of Carrière and Ghys's criterion for nonamenability, along with a new Ping-Pong-style argument we call the "Paddle-ball lemma" that we use to apply this criterion in our setting. This is joint work with Anush Tserunyan.
Seminar webpage: https://www.math.uni-leipzig.de/~grabowski/acseminar/">https://www.math.uni-leipzig.de/~grabowski/acseminar/
No Attachment
Beginn: 1. Juni 2023 13:15
Ende: 1. Juni 2023 14:15