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# Tag Archives: Ben Green

## Green on derangements

I have to mention Ben Green again. Yesterday he gave a lovely colloquium talk on a problem I had cracked my head against some years ago without much success. As usual with derangements, the story begins with a classical result: … Continue reading

## Caps in AG(n,3)

For the past week and a half I have done little but mark exam papers. At some point during this, I looked at Tim Gowers’ blog, and read that a very significant improvement had very recently been made on the … Continue reading

Posted in Uncategorized
Tagged additive combinatorics, Ben Green, cap, capset, finite geometry, IMS, linear algebra, NUS, Singapore
7 Comments

## London Combinatorics Colloquia, 2

It’s that time of year again, and while I miss the buttercups in Reading, we had as usual a feast of interesting mathematics and a large and enthusiastic audience. It was a bit more tightly focussed than I would have … Continue reading

Posted in events, exposition
Tagged amenability, Ben Green, Cayley graphs, Endre Szemeredi, Gabor Kun, Noga Alon, Norman Biggs, Regularity Lemma, sum-free sets
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