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University of Cambridge > Talks.cam > DPMMS Presentations > The structure of approximate Abelian groups

## The structure of approximate Abelian groupsAdd to your list(s) Download to your calendar using vCal - Tom Sanders (Oxford)
- Tuesday 05 February 2013, 14:00-15:00
- CMS, MR11.
If you have a question about this talk, please contact Julia Blackwell. This talk has been canceled/deleted In this talk we shall look at the structure of sets that partially satisfy the axioms of an Abelian group. Specifically, we shall look at sets $A$ for which the proportion of triples $x,y,z \in A$ having $x+y-z \in A$ is at least $\delta$. (If $\delta =1$ then such sets are genuine cosets; for smaller $\delta$ we think of them as partial cosets.) A description of these sets is given by Freiman’s theorem, and our goal is to cover some recent improvements in this result. The talk is intended to be accessible, and will cover examples as well as what Freiman’s theorem is and why it is important.’ This talk is part of the DPMMS Presentations series. ## This talk is included in these lists:This talk is not included in any other list Note that ex-directory lists are not shown. |
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