A codimension q-foliation is a partition of a manifold into submanifolds that locally looks like the fibers of a submersion onto the Euclidean space of dimension q. Foliations come with cohomological invariants – the most famous one being the…
Eventi
Large deviations for stochastic models of chemical reaction networks – Andrea Agazzi (Duke University)
At the microscopic level, the dynamics of arbitrary networks ofchemicalreactions can be modeled as jump Markov processes whose sample paths converge, in the limit oflargenumber of molecules, to the solutions of a set of algebraic ordinary…
Il gruppo degli automorfismi di un gruppo libero finitamente generato – Dario Ascari (Oxford University)
Parleremo di gruppi liberi, loro basi, e loro gruppi di automorfismi. Introdurremo le trasformazioni di Whitehead e l’algoritmo di Whitehead. Introdurremo alcuni spazi di fondamentale importanza nello studio di Aut(Fn) e di Out(Fn), come l’Outer…
On the fixed points of Branching Brownian motion. – Atul Shekhar (Université Lyon 1)
We consider a particle system on the real line in which each particle evolves into many particles via independent Branching Brownian motions. Under a very mild natural assumption, we give a full characterisation of the fixed points of this particle…
Compatibility, embedding and regularization of non-local random walks on graphs – Davide Bianchi (University of Insubria, Como, Italy)
Several variants of the graph Laplacian have been introduced to model non-local diffusion pro- cesses, which allow a random walker to “jump” to non-neighborhood nodes, most notably the path graph Laplacians and the fractional graph Laplacian, see…
Infinite mixing for accessible skew products – Paolo Giulietti (Università di Pisa)
I will present some decay of correlations results on skew products which are locally accessible. The results rely on the study of a twisted transfer operator and could be generalized to many other situations. I will also present numerical…
Entropy production in nondegenerate diffusions: the large-time and small-noise limits – Renaud Raquépas (McGill University Montréal and Université Grenoble Alpes)
Entropy production (EP) is a key quantity originating from thermodynamics and statistical physics which quantifies the irreversibility of the time evolution of physical systems. I will start with a general introduction to the different approaches to…
Birkhoff-Poritsky conjecture for centrally-symmetric billiards – Misha Bialy (Tel Aviv University (Israel))
In this talk I shall discuss Birkhoff-Poritsky conjecture for centrally-symmetric C^2-smooth convex planar billiards. We assume that the domain A between the invariant curve of 4-periodic orbits and the boundary of the phase cylinder is foliated by…
Dissipative SQG equations driven by space-time white noise – Martin Saal (Scuola Normale Superiore Pisa)
Abstract…
Hyperbolic motion in the Newtonian N-body problem with arbitrary limit shape – Andrea Venturelli (Université d’Avignon, France)
We prove for the N-body problem the existence of hyperbolic motions for any prescribed limit shape and any given initial configuration of the bodies. The energy level h>0 of the motion can also be chosen arbitrarily. Our approach is based on the…