Levi's parametrix for some sub-elliptic non-divergence form operators.
Localisation et front d'onde analytique
L’opérateur de Casimir de
Mathematical and physical aspects of the initial value problem for a nonlocal model of heat propagation with finite speed
Theories of heat predicting a finite speed of propagation of thermal signals have come into existence during the last 50 years. It is worth emphasizing that in contrast to the classical heat theory, these nonclassical theories involve a hyperbolic type heat equation and are based on experiments exhibiting the actual occurrence of wave-type heat transport (so called second sound). This paper presents a new system of equations describing a nonlocal model of heat propagation with finite speed in the...
Mémoire sur l'intégration des équations aux différences partielles de la Physique mathématique.
On a Parabolic Symmetry Problem.
On a singular sublinear polyharmonic problem.
On smoothness of a fundamental solution to a second order hyperbolic equation.
On some quasimetrics and their applications.
On splitting up singularities of fundamental solutions to elliptic equations in ℂ2
It is known that the fundamental solution to an elliptic differential equation with analytic coefficients exists, is determined up to the kernel of the differential operator, and has singularities on characteristics of the equation in ℂ2. In this paper we construct a representation of fundamental solution as a sum of functions, each of those has singularity on a single characteristic.
On the asymptotic behavior for convection-diffusion equations associated to higher order elliptic operators in divergence form.
We consider the linear convection-diffusion equation associated to higher order elliptic operators⎧ ut + Ltu = a∇u on Rnx(0,∞)⎩ u(0) = u0 ∈ L1(Rn),where a is a constant vector in Rn, m ∈ N*, n ≥ 1 and L0 belongs to a class of higher order elliptic operators in divergence form associated to non-smooth bounded measurable coefficients on Rn. The aim of this paper is to study the asymptotic behavior, in Lp (1 ≤ p ≤ ∞), of the derivatives Dγu(t) of the solution of the convection-diffusion equation...
On the continuity of heat potentials
On the iterated Green functions on a bounded domain and their related Kato class of potentials.
On the least principal fundamental solution of a parabolic differential equation
On the operator related to Bessel heat equation.
On the relative fundamental solutions for a second order differential operator on the Heisenberg group
Let Hₙ be the (2n+1)-dimensional Heisenberg group, let p,q ≥ 1 be integers satisfying p+q=n, and let , where X₁,Y₁,...,Xₙ,Yₙ,T denotes the standard basis of the Lie algebra of Hₙ. We compute explicitly a relative fundamental solution for L.
Operator equations, separation of variables and relativistic alterations.
Optimal -properties of Green’s functions for non-divergence elliptic equations in two dimensions
A sharp integrability result for non-negative adjoint solutions to planar non-divergence elliptic equations is proved. A uniform estimate is also given for the Green's function.
Paramétrix du problème de Cauchy pour un système faiblement hyperbolique à caractéristiques multiples
Perturbations singulières et noyaux de Poisson pour les opérateurs frontières homogènes