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Tag Archives: sumfree sets
Clive Sinclair
Yesterday I read the news that Clive Sinclair has died. This brought back memories of my first encounter with personal computers nearly 40 years ago. At the time I had a demanding job and three small children, and I was … Continue reading
Posted in doing mathematics, history, open problems
Tagged Neil Calkin, sumfree sets, ZX Spectrum
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London Combinatorics Colloquia 2017
A brief trip to London for the two colloquia and a meeting of the committee, marred for me by the fact that I had come down with quite a bad cold (which, scarily, involved my losing my balance from time … Continue reading
From the archive, 5
The first of my two papers with Paul Erdős was published in 1990 in a conference proceedings, and is a bit inaccessible; I have never managed to find a copy on the web. The Hungarians are collecting electronic copies of … Continue reading
From the archive, 3
This is what I looked like in 1991: And here is evidence for the Cameron–Erdős conjecture before it was proved:
Posted in history, Neill Cameron artwork
Tagged CameronErdos conjecture, sumfree sets
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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, sumfree sets
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Homogeneous Cayley objects, 3
In this post, I will consider Henson’s graphs as Cayley graphs. Henson’s graphs Recall from the first post of the series the conditions for a class of finite relational structures to be a Fraïssé class, that is, the class of … Continue reading