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Chevron structures in Smectic A liquid crystals

We study the Chen-Lubensky free energy functional to understand the zigzag pattern formed in a smectic A liquid crystal in the presence of an applied magnetic field. We identify a small dimensionless ...

1D and multi-d Burgers Turbulence as a model case for the Kolmogorov Theory

The Kolmogorov 1941 theory (K41) is, in a way, the starting point for all models of turbulence. In particular, K41 and corrections to it provide estimates of small-scale quantities such as increments ...

Large deviations of the empirical current in zero-range processes on a ring.

We examine atypical current fluctuations in totally asymmetric zero-range processes in one dimension with periodic boundary conditions. The zero-range processes is a stochastic lattice gas in which ea...

Hyperbolicity of the minimisers for the stochastic Burgers equation

We consider the stochastic Burgers equation from a Lagrangian viewpoint. In other words, we study the dynamical behaviour of the energy minimisers which give the variational behaviour of the solution....

Numerical methods for pricing options under jump--diffusion processes and stochastic volatility models.

Partial integro-differential equation (PIDE) formulations are often preferable for pricing options under models with stochastic volatility and jumps. In this talk, we consider the numerical approximat...

The regularity of 2-dimensional area-minimizing integral currents

Building upon the Almgren's big regularity paper, Chang proved in the eighties that the singularities of area-minimizing integral 2-dimensional currents are isolated. His proof relies on a suitable im...

Metodi a tempo discreto per equazioni di convoluzione associate alle equazioni delle onde

Nel seminario presenterò una nuova famiglia di metodi numerici per la approssimazione di equazioni di convoluzione associate alle equazioni delle onde. Lavorando nel dominio di Laplace, siamo riusciti...

Uniqueness of large solutions in a ball for n-Laplace equation with critical non linearity

Brezis posed the problem of uniqueness for solutions in a ball for Brezis- Nirenberg problem. it was solved by many people, The main ingredient is the clever way using the Pohozaev Identity. But in di...

On the role of ultramodularity (and Schur concavity) in the construction of binary copulas

We discuss and stress the role of ultramodularity in special types of constructions of binary copulas. After recalling of some known ultamodularity-based results, we focus on a the so-called D-product...

On the stability of solutions of semilinear elliptic equations with Robin boundary conditions on Riemannian manifolds

We investigate existence and nonexistence of stationary stable non constant solutions, i.e. patterns, of semilinear parabolic problems in bounded domains of Riemannian manifolds satisfying Robin bound...

Qual è lo spazio tangente a xy=0 nell'origine?

Mostreremo come rispondere a questa domanda porti naturalmente ad una scorribanda nei territori della geometria algebrica derivata e delle algebre di Lie differenziali graduate....

Unire e dividere: compatibilità combinatorie

Le algebre di Hopf hanno fatto il loro ingresso in combinatoria negli anni '80: esse hanno basi parametrizzate in modo naturale da oggetti discreti: permutazioni, partizioni, composizioni, tableaux, g...