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Tuesday, 24 March 2026 - 10:00 to 11:30 <br />
Place: IM, konírna
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Speaker: Michal Ferov, University of South Bohemia in České Budějovice<br />
Title: Willis' scale function for TDLC groups acting on trees with Tits independence property P
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Abstract <br />
<p>A group G acting faithfully on a graph X can be equipped with a permutation topology, making a totally disconnected topological group. If G has finite suborbits then it is locally compact. Some properties of totally disconnected locally (TDLC) compact groups are captured by the Willis' scale function. We show that for TDLC groups acting on trees with Tits independence property P, the scale function can be computed from finite combinatorial data and and, as an application, we show that every uniscalar P-closed group is either horocyclic or compact-by-discrete.</p><p>(joint work with Marcus Chijoff and Stephan Tornier)</p>
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For more information see the seminar web page at <br />
https://www.math.cas.cz/index.php/events/seminar/6
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Set Theory and Analysis mailing list <br />
settfa@math.cas.cz <br />
https://list.math.cas.cz/listinfo/settfa@math.cas.cz
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