Author Archives: Peter Cameron

About Peter Cameron

I count all the things that need to be counted.

Association schemes for diagonal groups

Posted on 12/05/2019

Sean Eberhard commented on my posts on diagonal groups (see here and here). He is correct; there is an association scheme preserved by the full diagonal group with n factors in the socle; it is non-trivial if n > 2. The details … Continue reading →

Posted in open problems | Tagged , , , | 1 Comment

London Combinatorics Colloquia 2019

Posted on 11/05/2019

In London last week for the two combinatorics colloquia, at Queen Mary and LSE. The weather was unusually grey and rainy; it seems in retrospect that it is almost always fine and sunny for this event, but I know that … Continue reading →

Posted in events, exposition | Tagged , , , , , , , | Leave a comment

A virtual colloquium

Posted on 22/04/2019

I feel a bit nervous about advertising this. This Thursday, 25 April, I am for the first time ever giving a virtual colloquium. The Northeast Combinatorics Network (that’s Northeast North America, for pedants) have an occasional Virtual Combinatorics Colloquium, and … Continue reading →

Posted in events | Tagged , , | 4 Comments

Mary Queen of Scots Way

Posted on 21/04/2019

Walking is very popular now. To meet the demand, many new named long-distance paths have been created. I wrote earlier about my proposed X to Y walk, which I fully intended to do when I retired, but I haven’t quite … Continue reading →

Posted in geography, history | Tagged , , , , , , , | 1 Comment

A talk by Stephen Senn

Posted on 17/04/2019

I’ve just heard a nice talk by Stephen Senn, entitled “In search of lost infinities. What is the ‘n’ in big data?” The moral was that, in clinical trials and observational trials, everyone assumes that more data mean more accurate … Continue reading →

Posted in Uncategorized | Tagged , | Leave a comment

Fair games and Artin’s conjecture

Posted on 10/04/2019

A few years ago I described Persi Diaconis’ response to G. H. Hardy’s claim that there is a real dividing line between real and recreational mathematics. (See the report here.) This led from Persi’s first experiments in card shuffling to Artin’s conjecture … Continue reading →

Posted in exposition, mathematics, open problems | Tagged , , , , | Leave a comment

Atiyah memorial day

Posted on 08/04/2019

On Saturday, we went to the memorial event for Michael Atiyah, held in the magnificent Playfair Library in the University of Edinburgh’s Old College buildings. (Not named after John Playfair, Professor of Mathematics in Edinburgh and responsible for Playfair’s Axiom, … Continue reading →

Posted in Uncategorized | Tagged , , , , , | 2 Comments