Future talks
Lundi 07 octobre 2013:
Yacine Ikhlef
(LPTHE, Université Pierre et Marie Curie/CNRS) Discrete parafermions
and quantum-group symmetries
In two-dimensional statistical models, discrete parafermions are
non-local operators which satisfy a lattice version of the
Cauchy-Riemannn (CR) equations, and they can be used to establish
rigorously the scaling limits of interfaces and correlation functions.
The relation between this notion and that of integrability has been a
challenging puzzle. For models with an underlying quantum-group
symmetry, I will explain how to obtain systematically the discrete
parafermions, starting from the Bernard-Felder construction of
non-local conserved currents.
Lundi 14 octobre 2013:
Nicolas
Curien (Paris 6)
Lundi 21 octobre 2013:
Jean Bertoin
(university of Zurich) The cut-tree of large recursive trees.
Imagine a graph which is progressively destroyed by cutting its edges
one after the other in a uniform random order. The
so-called cut-tree records key steps of this destruction
process. It can be viewed as a random metric space equipped with
a natural probability mass. In this work, we show that the cut-tree of
a random recursive tree of size $n$, rescaled by the factor
$n^{-1}\ln n$, converges in probability as $n\to \infty$ in the sense
of Gromov-Hausdorff-Prokhorov, to the unit interval endowed with the
usual distance and Lebesgue measure. This enables us to explain and
extend some recent results of Kuba and Panholzer on multiple isolation
of nodes in random recursive trees.
Lundi 28 octobre 2013 (16:15):
Noam
Berger (Technische Universität München)
Local limit
theorem for ballistic random walk in random environments.
We prove a version of a
local CLT for random walk in random environments
satisfying Sznitman’s ballisticity condition (T’) in
dimension four and higher. This is joint work with
Moran Cohen and Ron Rosenthal.
Lundi 28 octobre 2013 (15:00):
John
Cardy (Oxford) Lattice Stress Tensor and Conformal Ward
Identities'
One of the basic objects of conformal field theory (CFT) is the
stress tensor. This has two independent components, one
holomorphic, the other antiholomorphic, which are assumed to satisfy
the conformal Ward identities, which imply the Virasoro algebra and
form the basis for the systematic development of CFT. In this talk I
propose a lattice version of the stress tensor, which, for a wide
class of lattice models, is both discretely (anti)holomorphic and
can be argued to satisfy the conformal Ward identities in the
scaling limit.
Lundi 04 novembre 2013: Séminaire Lyon-Genève
Lundi 11 novembre 2013:
Yves Le Jan
(Paris 11)
Lundi 2 décembre 2013:
Yakov
Eliashberg
Lundi 9 décembre 2013:
Ron Rosenthal