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University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > The size of conjugacy classes of automorphism groups

## The size of conjugacy classes of automorphism groupsAdd to your list(s) Download to your calendar using vCal - Vidnynszky, Z (Alfrd Rnyi Institute of Mathematics)
- Friday 28 August 2015, 14:00-14:30
- Seminar Room 1, Newton Institute.
If you have a question about this talk, please contact webseminars. Mathematical, Foundational and Computational Aspects of the Higher Infinite The automorphism groups of Fraiss limits are usually interesting objects both from group theoretic and set theoretic viewpoint. However, these groups are often non-locally compact, hence there is no natural translation invariant measure on them. Christensen introduced the notion of Haar null sets in non-locally compact Polish groups which is a well-behaved generalisation of the null ideal to such groups. In my talk I will present some new results concerning the size of the conjugacy classes of automorphism groups of Fraisse limits with respect to this notion. This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
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