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Finite differences: 1D to 2D

We show that the combined action of similarity and symmetry produces 2D finite differences (2D dynamics) in the limit of 1D finite differences (1D dynamics). This provides a construction of the 2D Lap...

Turning and breakdown of waves for incompressible fluids

We consider the evolution of an interface generated between two immiscible, incompressible and irrotational fluids. Specifically we study the Muskat equation (the interface between oil and water in sa...

Motion of elastic films by anisotropic surface diffusion with curvature regularization

We present short time existence, uniqueness, and regularity results for a surface diffusion evolution equation with curvature regularization in the context of epitaxially strained two-dimensional film...

Controllability and Lipschitz stability for degenerate parabolic operators of Grushin type

Baouendi-Grushin operators are important classes of degenerate elliptic operators which are strongly connected with other domains of mathematics such as subriemannian geometry. Parabolic problems asso...

Precursors of frictional slip: from nano to macro scales

Abstract: It has been known for centuries that a body in contact with a substrate will start to slide only when the lateral force exceeds the static friction force. The transition from static to dynam...

Zubov's method and Differential Games

Zubov's method is a technique to characterize the domain of attraction of locally asymptotically stable equilibria of an ordinary differential equation (ODE) as the sublevel set of an appropriate Hami...

Relaxation and Necessary Conditions for Optimal Control Problems

Relaxation is a procedure in optimal control problem in which extra elements are added to the domain of an optimization problem in order to guarantee the existence of a minimizer. Of course the relaxe...

The energy critical nonlinear wave equation in 3D

We will discuss recent works with Duyckaerts and Merle, dealing with global well posedness, blow-up and soliton resolution, for the energy critical wave equation....

Polytope joint Lyapunov functions for stable and for stabilizable positive switched systems

We consider "positive" switched linear system of odes and propose a new method for the approximation of the upper Lyapunov exponent and lower Lyapunov exponent. The method is based on the iterative co...

Generic Aubry sets on surfaces

Given a Tonelli Hamiltonian on a compact manifold, we can construct a compact invariant subset of the cotangent bundle enjoying variational properties which has the distinguished property of being a L...