Previous meetings: Winter 08 session (including scans of participants' notes)
11th meeting: January 29th (Thursday) 2pm Mall 1
1. Robert Marsh: "Potts partition functions -- Concatenating graphs II."
12th meeting: Feb 5th (Thursday) 2pm Magic Room
1. Robert Marsh: "The Potts transfer matrix: rise of the Temperley-Lieb algebras."
13th meeting: Feb 12th (Thursday) 2pm Mall 1
1. Robert Marsh: "The Potts transfer matrix: Temperley-Lieb algebras II."
14th meeting: Feb 19th (Thursday) 2pm Mall 1
1. Robert Marsh: "The Potts transfer matrix: Temperley-Lieb algebras III."
15th meeting: Feb 26th (Thursday) 2pm Magic Room
1. Peter Crompton: "The Tutte polynomial I."
References: The Computational Complexity of some classical problems from Stat Phys (Welsh)
Inapproximability of the Tutte polynomial (Goldberg)
The Computational Complexity of Tutte Invariants for Planar Graphs (Vertigan)
16th meeting: Mar 5th (Thursday) 2pm Mall 1
1. Peter Crompton: "The Tutte polynomial II: #P Strikes Back - Return of the Matroid"
17th meeting: Mar 12th (Thursday) 2pm Leeds Art Gallery (Main Lecture Theatre)
1. Jeanne Scott: "Laurent expansions for Plucker coordinates via perfect matchings." (slides)
18th meeting: Mar 19th (Thursday) 2pm Mall 1
1. Peter Crompton: "Non-perturbative Quantum effects"
(Peter to Robert, on quivers in SM) I have attached some stuff on the connections between quivers and Statistical Mechanics for Thursday. I hope some of its helpful ... 0011192v3 - is a handwaving way to define a quiver in Physics 0503149v2 - is a way of defining Statistical Mechanics from quivers jehp122005025 - is an explicit quiver for the Ising model 0302228v1 - is formally why duals aren't very well defined ideas in (space+time) models of Physics. The mapping is known as "Wick-rotation", and to further confuse the issue, Physicists also interchange Euclidean-time with the temperature "beta" in this context. 0610003v2 - is a bit more what I'm doing on "time", using a description of 9911114v1 the singularities associated with covering maps (space+time -> space) called asymptotic freedom.
(Matt to Sathish, on temperature) ... (omitted -- hopefully Sathish's notes will abstract this)
Organisers: Sathish, Jeanne and Paul