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University of Cambridge > Talks.cam > Geometric Group Theory (GGT) Seminar > Approximate actions and Ulam stability

## Approximate actions and Ulam stabilityAdd to your list(s) Download to your calendar using vCal - Oren Becker (University of Cambridge)
- Friday 08 November 2019, 13:45-14:45
- CMS, MR13.
If you have a question about this talk, please contact . Given two permutations A and B in Sym(n) such that AB and BA are almost equal, are there A’ and B’ in Sym(n) such that A is close to A’, B is close to B’, and A’B’=B’A’?
Arzhantseva and Paunescu formalized this question and gave an affirmative answer: “Nearly commuting permutations are near commuting permutations”. Equivalently, approximate actions of the group Z This will bring into the picture notions such as Property (T), amenability, invariant random subgroups, sofic groups and property testing. The talk is based on joint works with Alex Lubotzky, Andreas Thom and Jonathan Mosheiff. This talk is part of the Geometric Group Theory (GGT) Seminar series. ## This talk is included in these lists:- All CMS events
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