Tag Archives: association schemes

G2D2, 2: first week

Posted on 18/08/2019 by

The campus of the China Three Gorges Hotel has a small river, full of waterlilies and lotus flowers. Beside it runs a main road, along which big water trucks run, shooting atomised water from cannon-like structures; we are told this … Continue reading →

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

Pilsen, days 1 and 2

Posted on 03/07/2018 by

The conference on “Symmetry vs Regularity” in Pilsen has begun. I hesitate at trying to describe the talks, since the first day alone had 13 talks, and the second day 19, of lengths ranging from ten minutes to an hour, … Continue reading →

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

Symmetry vs Regularity

Posted on 06/12/2017 by

This is the title of a conference to be held next year (2018) from 1 to 7 July, in Pilsen, Bohemia, Czech Republic. The subtitle is “The first 50 years since Weisfeiler-Leman stabilization”, and the webpage is here. If you … Continue reading →

Posted in events, exposition | Tagged , , , , , , , | 1 Comment

Workshop on Bannai-Ito theory

Posted on 01/12/2017 by

The original purpose of our trip to China was to speak at an international workshop on Bannai-Ito theory at Zhejiang University in Hangzhou, a popular Chinese tourist destination. Hangzhou is set on an artificial (but centuries old) lake, with islands, … Continue reading →

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

EKR, Steiner systems, association schemes, and all that

Posted on 29/09/2017 by

A great number of mathematical problems amount to looking in a large but highly structured graph, and finding a complete or null subgraph of largest possible size there. For a simple example, consider Latin squares of order n. One of … Continue reading →

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

Busy times, 8: Algebraic graph theory at Villanova

Posted on 08/06/2014 by

This week, five time zones to the west; next week, three to the east. This week was Andrew Woldar’s conference on algebraic graph theory at Villanova University, a Catholic school founded by Irish Augustinian friars in about 1850. I had … Continue reading →

Posted in events | Tagged , , , , | 1 Comment