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Category Archives: Uncategorized
Sesqui-arrays
Rosemary Bailey, Tomas Nilson and I have just put a paper on the arXiv on this topic. I discussed related things here last year, but here is a reminder. A triple array is an r×c array whose entries are from … Continue reading
Posted in Uncategorized
Tagged Agrawal's conjecture, biplanes, Marshall Hall, Tomas Nilson, triple arrays
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Impostor Syndrome
I have learned a new term: Impostor Syndrome. This came up in a report in the London Mathematical Society newsletter of a meeting in St Andrews on gender diversity in mathematics (which I didn’t attend). Impostor Syndrome is described by … Continue reading
Synchronization and separation in the Johnson schemes
Today a paper by Mohammed Aljohani, John Bamberg and me went on the arXiv on this topic. Here is a brief summary of what it is about. Synchronization comes in several flavours, and the point of the paper is to … Continue reading
Posted in exposition, Uncategorized
Tagged association scheme, Peter Keevash, Philippe Delsarte, separation, synchronization
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Laszlo Babai in St Andrews
I promised to say a few words about Laci Babai’s visit to St Andrews. In an amazing performance, he gave five talks: one of nominally an hour at the Scottish Combinatorics Meeting (it was actually the last talk of the … Continue reading
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A message
Last week my daughter and her family came for a short holiday. We went to East Sands where the children wrote messages on driftwood and threw them into the sea. Looking for replies, they found this: Is it a message … Continue reading
ZFC is consistent!
Here is a small model of a large cardinal, from the Albertina Gallery in Vienna. His existence shows that ZFC is consistent.
A golden age?
Was there a lost Golden Age for science? I am grateful to Ursula Martin for directing my attention to a paper by a geographer at Queen Mary, Kerry Holden, entitled “Lamenting the Golden Age: Love, Labour and Loss in the … Continue reading
