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Costanti ottimali in disuguaglianze di Moser-Trudinger e equazioni di Liouville singolari

Consideriamo un'equazione di Liouville su superfici compatte motivata dallo studio di modelli di Chern-Simons autoduali e dal problema di prescrizione della curvatura Gaussiana con singolarità coniche...

Zero temperature limite and cell problem in Hamilton-Jacobi

The goal of the lecture is to present an attempt to relate in a discrete setting, on the one hand, a ground state obtained by thermodynamic formalism and, on the other hand, a solution of the discrete...

Shape optimization problems for variational functionals under geometric constraints

We consider extremum problems for some classical functionals of the Calculus of Variations (such as torsional rigidity, first Dirichlet eigenvalue, electrostatic capacity), subject to geometric constr...

Multilevel Methods for Ill-Posed Problems

Multilevel methods for the solution of well-posed problems, such as certain boundary value problems for partial differential equations and Fredholm integral equations of the second kind, are popular a...

Incroci di autovalori e valori singolari per matrici dipendenti da 2 o 3 parametri

In questo seminario riassumiamo lavori recenti su come localizzare punti nello spazio (2 o 3 dimensionale), dove autovalori di matrici simmetriche (Hermitiane) collassano (alternativamente, valori sin...

Osservazioni sulla dinamica di certe equazioni di tipo forward-backward

If \phi:R\to R is a non-convex energy density, the initial-boundary value problem for the equation (1) \begin{equation} \left\{ \begin{array}{ll} u_t+\frac{1}{2}(\phi(u_x))_x,x\in(0,1) \\ u(\cdot,0)=u...

Ricostruzione di alcune grandezze geometriche nella applicazione dei metodi level-set ai motori a combustibile solido

Nella previsione e ricostruzione della balistica interna degli endoreattori a propellente solido uno degli aspetti cruciali è il calcolo della regressione della superficie del grano propellente, regre...

Equazioni di Hamilton-Jacobi su grafi

Equazioni alle derivate parziali su grafi hanno numerose applicazioni (per esempio modelli di traffico, circolazione del sangue, social networks, internet, etc.). In molti di questi problemi e' import...

Semiclassical limit of linear Schrodinger equation with singular and rough potentials

We describe some recent work on the semiclassical limit of the linear Schrodinger equation. Under mild regularity assumptions on the potential U which include Born-Oppenheimer potential energy surface...

What can be estimated by the L^1 norm of some components of the derivatives of a vector field?

Given a vector homogeneous differential operator of order 1 A(D) acting on vector fields, I will answer to the question whether there is a Gagliardo--Nirenberg type estimate of the form ||u||_{L^{n/(n...

A mathematical model of neuronal fibers

Diffusion MRI is a magnetic resonance imaging (MRI) method producing images of biological tissues weighted with the local characteristics of water diffusion. In our case we are concerned with neural a...

One-dimensional symmetry for solutions of Allen Cahn fully nonlinear equations

In this talk we shall present some qualitative results for solutions of the fully nonlinear elliptic Allen Cahn Equation; precisely we shall see that under specific conditions the solutions are one-di...