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Tag Archives: permutation patterns
A mathematical promenade
I haven’t posted for a while; I have been in China where the firewall allows me to read WordPress but not to post. Normal service now resumed (hopefully). Given four real polynomials, all of which vanish at the origin, suppose … Continue reading
Posted in books, exposition
Tagged Hipparchus, permutation patterns, real algebraic curves, Schroeder numbers
1 Comment
Permutation patterns, day 1
Today is the first day of Permutation Patterns 15, at the London Mathematical Society headquarters in De Morgan House. Registration began at 8.30. I don’t like using the Underground at that time of day if it can be avoided; but … Continue reading
Postgraduate Combinatorial Conference 2015
This week I was at the Postgraduate Combinatorial Conference, which was held in Queen Mary, University of London. It was one of the liveliest PCCs I have been to, with about 35 delegates from all over England, Scotland, and further … Continue reading
A problem and a bet
In the young but flourishing subject of permutation patterns, it is usual to regard a permutation of {1,…,n} as simply a sequence containing each of these numbers just once. So 31542 is a permutation of {1,…,5}. This is in agreement … Continue reading
Southeastern
The SouthEastern International Conference on Combinatorics, Graph Theory and Computing has been going for 44 years. I am not sure of its early history. For some time it alternated between Boca Raton (Florida) and Baton Rouge (Louisiana), but now it … Continue reading
Homogeneous Cayley objects, 4
I started this sequence to give myself an incentive to prove an old conjecture of mine; and this time it worked. Yesterday I put a paper on the arXiv; it should appear in Monday’s mailing. Here is a preview of … Continue reading
Posted in exposition
Tagged dense, diophantine approximation, Kronecker's theorem, multiorder, order, permutation patterns
1 Comment