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Author Archives: Peter Cameron
A real-world problem
Imagine you are in the following situation. You are the foreign minister of your country. You are in New York for a meeting of the General Assembly of the United Nations. A powerful enemy has been deploying troops on the … Continue reading
Deep isoclinism
Graphs and groups, in my view, are two subjects engaged in a wide-ranging dialogue at present. Graphs can be used to describe interesting classes of groups, and groups to construct interesting graphs. But I am delighted that recently, in a … Continue reading
The Latin square
A few years ago, R. A. Fisher (who has been derscribed as “the greatest Darwinist since Darwin”, and as “the founder of modern statistics”) fell victim to one of the waves created by the Black Lives Matter campaign, and a … Continue reading
ICM in Philadelphia
The latest newsletter from the International Mathematical Union urges mathematicians to attend this year’s ICM in Philadelphia. It will help our beleaguered collleagues in the USA by showing support, and the organisers guarantee our personal safety. Well, I will not … Continue reading
Eugene Plotkin
I believe Eugene Plotkin has died. I read this on the AGTA website but I have no details. I met him for the first and only time at Daniela Nikolova’s birthday conference in Deerfield Beach, Florida, four years ago. We … Continue reading
Digraphs on groups
I have spent a lot of time recently thinking about graphs on groups. To recall the rules: the vertex set must be the group (in general, but not here, I allow an automorphism-invariant subset or the quotient by an automorphism-invariant … Continue reading
Positive news about AI
I have been, and remain, sceptical about AI. At best, it is saiad to be good at writing programs, and finding specific facts; but it has a tendency to lie, to invent, and to tell you what it thinks you … Continue reading
Posted in doing mathematics, Uncategorized
Tagged Birch test, Claude, Claude Shannon, Donald Knuth, Hamiltonian decomposition
3 Comments
A counting problem
As the tagline for this blog says, I like counting things. Reading my Iran diary reminded me of a counting problem I solved then, of which I am quite proud. But like all good problems, it leaves a loose end, … Continue reading
Posted in doing mathematics, open problems
Tagged Charles JOhnson, graphs, symmetric sign patterns
3 Comments
23 years ago
What will happen to Iran once the smoke clears and the bombs stop falling? No one can predict; maybe the ayatollahs will hang on, and there will either be brutal repression or a chaotic attempt to remove them; maybe the … Continue reading
AAA108
Last month I was in Vienna, at AAA108. This was the 108th meeting of the Arbeitsgruppe Allgemeine Algebra (or Workshop on General Algebra), which has been going since 1971, with usually two meetings a year. The meetings are held at … Continue reading
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