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Existence and a priori estimate for elliptic problems with subquadratic gradient dependent terms

In this lecture I will consider the nonlinear elliptic model problem −div(A(x)∇u(x)) + cu(x) = γ...

Data assimilation problems: non standard approach and Tychonov regularisation revisited

Data assimilation problems consist in retrieving the value of the solution at some time (everywhere in the domain) for an evolution problem knowing informations on the solution on a subdomain during a...

Mathematical models for cell motion

Several transport-dffusion systems arise as simple models in chemotaxis (motion of bacterias or amebia interacting through a chemical signal) and in angiogenesis (development of capillary blood vessel...

Sul problema di Dirichlet per l’equazione della curvatura media

Si studia il problema di Dirichlet per l’equazione della curvatura media sul disco con dato al bordo gamma. Il problema è variazionale e caratterizzato da mancanza di compattezza. Se la curvatura medi...

A-priori bounds for semilinear elliptic equations in non-smooth domains

I will begin by giving a survey of some known methods for a-priori bounds of positive solutions of semilinear elliptic equations on smooth bounded domains with zero Dirichlet boundary conditions. I wi...

Un problema di rimozione di massa

Si considera il problema di rimuovere una fissata quantita di materiale da una regione D nella maniera piu efficiente possibile. Per tener conto del fatto che non tutte le direzioni si percorrono con ...

Degeneration of differential operators: an overview

I will discuss various modes of degeneration of differential operators and associated Lie algebras of vector fields and indicate a systematic approach to uniform invertibility under appropriate ellipt...

Construction of a blow up solution for a supercritical nonlinear Schrodinger equation

I will consider the quintic two-dimensional focusing nonlinear Schrodinger equation iut + ∆u +...

L’equazione iconale complessa

Lo studio dell’equazione iconale complessa e motivato dall’interesse per i cosiddetti raggi evanescenti, che, in ottica geometrica, aiutano a descrivere fenomeni di propagazione luminosa oltre le caus...

Elliptic systems with coupling in R n for a class of noncoercive potentials

We study the existence and multiplicity of solutions for a class of coupled semilinear elliptic systems in R n where none of the potentials are coercive. The main goal is to consider systems where the...
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