The thirty-first meeting of the North British Mathematical
Physics Seminar was held on **Saturday 29 October
2011** in Durham, in the Derman Christopherson Room of the
Calman Learning Centre, next to the Department of
Mathematical Sciences.
These
people came. The original page announcing the meeting is here.

In order to claim travel expenses (second class rail, bus,
(shared) taxi for local travel) please use the project section
of this
form. In addition,
and *only if you do not have a UK bank account*, please
use this
form for your contact
and banking details. Please complete the necessary
forms **electronically**, print them, sign the
claims form and send them both together with receipts or
tickets to

Bernd Schroers

Department of Mathematics

Heriot-Watt University

Riccarton

Edinburgh EH14 4AS

Please note that forms completed manually will
Department of Mathematics

Heriot-Watt University

Riccarton

Edinburgh EH14 4AS

11:00-11:30

Coffee (in the Maths Dept, room CM211)

11:30-12:25

Anne Taormina
(Durham)

I will briefly explain why some theoretical particle
physicists and number theorists have recently become interested in
'Mathieu 24 Moonshine' and present the construction of a novel map
between lattices to achieve a description of a group larger than
the largest finite symplectic automorphisms group of K3 surfaces
by orders of magnitude. The significance of this overarching
symmetry will be stressed.

12:30-13:45

Lunch

13:45-14:40

Christian Sämann
(Heriot-Watt)

I will discuss a lift of the ADHM construction of monopoles,
which can be interpreted in terms of a D1-D3-brane configuration, to a
construction of self-dual strings, which is related to an M2-M5-brane
configuration. This construction involves a loop space description of
the M5-brane theory.

14:45-15:40

Herbert Gangl
(Durham)

The analytical evaluation of Feynman integrals is a crucial
problem in particle physics. Feynman integrals can generally be
expressed in terms of (special classes of) multiple
polylogarithms. While the actual functions can become very hard
to deal with, it turns out to be more accessible to work with an
algebraic avatar of a polylogarithm, dubbed a "symbol" by
Goncharov. We will introduce polylogarithms and discuss some of
their properties, in particular how to form--and work with--their
associated symbol, and, time permitting, indicate a procedure
which sometimes allows to retrieve the function from a given
symbol (joint with C.Duhr and J.Rhodes).

15:45-16:30

Tea

16:30-16:55

Carlos Scarinci
(Nottingham)

We describe a parametrization of the phase space of 2+1 globally
hyperbolic AdS spacetimes by two copies of universal
Teichmüller space obtained from the correspondence between maximal
surfaces in AdS_3 and quasi-symmetric homeomorphisms of the circle.
This yields a natural map
generalizing the Mess map to spacetimes with noncompact spatial
topology. We also relate such parametrization to the Chern-Simons
formulation of 2+1 gravity and the holographic (Fefferman-Graham)
description.

17:00-17:25

Noel Hustler
(Edinburgh)

The bosonic field equations of type IIB supergravity are
reduced on a locally (Cartan) symmetric background and through the
complete classification of symmetric spaces, we identify all symmetric
space backgrounds of type IIB supergravity up to local isometry.

Train information can be obtained here.

For directions to the Department of Mathematical Sciences click here, here or here.

Tea, coffee and biscuits will be provided free of charge. There might be a sandwich lunch for which participants might be charged (depending on funding).

Limited funds are available to help with travel expenses of participants with no other source of funding. We hope that this will encourage postgraduate students and postdocs to attend the meeting. Please email Patrick Dorey in advance if you would like to apply for support and please book early to take advantage of the cheaper fares.

Patrick Dorey
Last modified: 30 October 2011