Logic Seminar
Online Event
Isometry groups of Polish ultrametric spaces
Riccardo Camerlo,
Associate Professor,
Department of Mathematics,
Università di Genova,
Please note that the time is PST
A characterisation of isometry topological groups of Polish ultrametric spaces is provided. This answers in the context of Polish spaces a problem of Krasner's. A finer analysis allows also to characterise isometry topological groups of subclasses of Polish ultrametric spaces, providing a solution to questions raised by Gao and Kechris. The groups obtained involve various kinds of generalised wreath products proposed in the literature by Hall, Holland, and Malicki. This is a joint work with A. Marcone and L. Motto Ros.
For more information, please contact Math Dept. by phone at 626-395-4335 or by email at [email protected].
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Logic Seminar Series
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