Tag Archives: partition

The builder and the church

Yesterday I went for a walk in south London. I verified Adam’s statement that there are bluebells there, though I didn’t see the wonderful displays that the Chilterns provide. I’ll just record a few other impressions. I saw a builder’s … Continue reading

Posted in geography, maybe politics | Tagged , , | 5 Comments

Coherent configurations and all that, 1

I’m off to Lisbon next week for three weeks. Among other things, I will be giving four lectures at the Centre for Algebra at the University of Lisbon. One of these will touch on aspects of association schemes and coherent … Continue reading

Posted in exposition, history | Tagged , , , | 8 Comments

Kirkman’s schoolgirls and their friends

Often it happens that, when I think about a hard problem, I am absolutely convinced that I know what the answer will be, but I merely lack a proof. In this post I want to discuss a problem which I … Continue reading

Posted in exposition, open problems | Tagged , , , , , | 5 Comments