I have just submitted to the arXiv a paper with this title. The idea was born during an evening walk around the campus of IIT Madras with Arun Kumar. I remarked that I would like to have a method of finding the result of complete twin reduction of a graph without actually going through the…

Peter Cameron's Blog

29.07.2025

When is a group not a group? | Peter Cameron's Blog

Open any algebra textbook, and you will be told that a group consists of a set of elements with a binary function defined on it and satisfying a few axioms. But if you assume that is always the case, you may occasionally be in for a surprise. A lot of my recent work involves graphs…

Peter Cameron's Blog

08.08.2025

Travels, 13 | Peter Cameron's Blog

Not too much to say about the final leg of more than a month of travelling. On Friday morning, after the conference was over, we had breakfast and checked out, and then João took us and Cheryl Praeger to the airport. I had arranged to get a fairly late plane since I didn't really know…

Peter Cameron's Blog

09.08.2025

Mathematical family | Peter Cameron's Blog

Officially, I retired (or strictly speaking, was made redundant) on 28 February. But I was still teaching and directing a student project until the end of May, as well as fighting against various problems caused by different parts of the University not talking to each other (so, as one congratulated me, another told me that…

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A new look at twin reduction | Peter Cameron's Blog

When is a group not a group? | Peter Cameron's Blog

Travels, 13 | Peter Cameron's Blog

Mathematical family | Peter Cameron's Blog

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