Prolongement méromorphe de la matrice de scattering pour des problèmes à deux corps à longue portée
Prolongement méromorphe de la matrice de scattering pour des problèmes à deux corps à longue portée
Proof of two conjectures of H. Brezis and L.A. Peletier.
Propagation de singularités pour des équations hyperboliques non linéaires
Propagation des mesures de Wigner à travers un croisement de codimension 1 dégénéré
Propagation of analytic singularities for the Schrödinger Equation
Propagation of Gevrey regularity over long times for the fully discrete Lie Trotter splitting scheme applied to the linear Schrödinger equation
In this paper, we study the linear Schrödinger equation over the d-dimensional torus, with small values of the perturbing potential. We consider numerical approximations of the associated solutions obtained by a symplectic splitting method (to discretize the time variable) in combination with the Fast Fourier Transform algorithm (to discretize the space variable). In this fully discrete setting, we prove that the regularity of the initial datum is preserved over long times, i.e. times that are...
Propagation of singularities in many-body scattering in the presence of bound states
In these lecture notes we describe the propagation of singularities of tempered distributional solutions of , where is a many-body hamiltonian , , , and is not a threshold of , under the assumption that the inter-particle (e.g. two-body) interactions are real-valued polyhomogeneous symbols of order (e.g. Coulomb-type with the singularity at the origin removed). Here the term “singularity” provides a microlocal description of the lack of decay at infinity. Our result is then that the...
Properness and topological degree for general elliptic operators.
Proprietà di sommabilità e di limitatezza per soluzioni di disequazioni variazionali ellittiche
Propriété des itérés et ellipticité
Propriétés asymptotiques des solutions d'équations simplement caractéristiques
Propriétés des courbes intégrales de champs de vecteurs et estimations ponctuelles d'équation elliptiques dégénérés
Propriétés et existence des solutions de certaines classes d'équations du type elliptique
Pseudo-Differential Operators in a Wave Diffraction Problem with Impedance Conditions
Mathematics Subject Classification: 35J05, 35J25, 35C15, 47H50, 47G30We consider an impedance boundary-value problem for the Helmholtz equation which models a wave diffraction problem with imperfect conductivity on a strip. Pseudo-differential operators are used to deal with this wave diffraction problem. Therefore, single and double layer potentials allow a reformulation of the problem into a system of integral equations. By using operator theoretical methods, the well-posedness of the problem...
Pseudoholomorphic strips in symplectisations I : asymptotic behavior
Pseudo-monotonicity and degenerate elliptic operators of second order.
Puits multiples (d'après des travaux avec B. Helffer)
Puits multiples en limite semi-classique. II. Interaction moléculaire. Symétries. Perturbation
Puits multiples en mécanique semi-classique VI. (Cas des puits sous-variétés)