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# Tag Archives: Jaap Seidel

## G2D2, 4: the second week

The lecturers of the first two minicourses now gave way for the second team. Mike Boyle and Scott Schmieding told us about symbolic dynamics, in particular, subshifts and their automorphism groups. This was particularly valuable to me: I had dove … Continue reading

## London Combinatorics Colloquia 2016

The tenth London Combinatorics Colloquia took place over the last two days. (As was pointed out, this is not the same as the tenth anniversary!) A dozen really excellent talks, and I cannot do justice to them all, so I … Continue reading

## Ernie Shult

Ernie Shult died last month. I just heard the news, from Corneliu Hoffman’s mailing list. I first met Ernie at a “microconference” on permutation groups organised in Oxford by Peter Neumann in the early 1970s when I was just starting … Continue reading

## From the archive, 4

A photocopy of a sheet of paper in my handwriting. At the top left, my initials are written in the handwriting of Jaap Seidel. The page begins as follows. Theorem. Let X be a set of points in the n-cube … Continue reading

Posted in exposition, history
Tagged cube, Jaap Seidel, Johnson scheme, symmetric group
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## Precursors

Jorge Luis Borges is one of the most mathematical of great writers. In an essay entitled “Kafka and his Precursors”, he pointed out that there is a strange collection of pieces and fragments, including Zeno’s paradox and stories by Han … Continue reading

## Andries Brouwer is (nearly) 60

Last week there was a conference for Andries Brouwer’s 60th birthday. Actually he is 60 on 3/4/2011, but we had some lectures to celebrate his birthday on 4/3/2011. The picture shows Andries at my birthday party in Ambleside in 2007 … Continue reading

Posted in events
Tagged Andries Brouwer, Eindhoven, Jaap Seidel, Jack van Lint, root systems
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