Partial differential equations with piecewise constant delay.
Periodic solutions of abstract differential equations: the Fourier method
Perron-Frobenius operators and the Klein-Gordon equation
For a smooth curve and a set in the plane , let be the space of finite Borel measures in the plane supported on , absolutely continuous with respect to the arc length and whose Fourier transform vanishes on . Following [12], we say that is a Heisenberg uniqueness pair if . In the context of a hyperbola , the study of Heisenberg uniqueness pairs is the same as looking for uniqueness sets of a collection of solutions to the Klein-Gordon equation. In this work, we mainly address the...
Propagation de singularités pour des problèmes aux limites d'ordre 2
Propagation of waves in a randomly stratified medium: an inverse problem.