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Martina Pfeifer

Gianluca Basso (Lyon 1): The dynamics of kaleidoscopic groups

Thursday, 03.02.2022 11:00 im Raum SRZ 216/217 und Zoom

Mathematik und Informatik

Duchesne, Monod and Wesolek described how to each permutation group of countable degree a group acting on a certain one-dimensional tree-like continuum. This is called its kaleidoscopic group. We reframe the construction in terms of countable structures and determine which dynamical properties are preserved when passing to the kaleidoscopic group. This requires a novel structural Ramsey theorem and produces a new class of examples exhibiting a poorly understood phenomenon. This is joint work with Todor Tsankov.



Angelegt am Friday, 28.01.2022 10:24 von Martina Pfeifer
Geändert am Friday, 28.01.2022 10:24 von Martina Pfeifer
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