Thierry Daud'e

collaborators

3 papers

math.AP2025

The spectrum of Dirichlet-to-Neumann maps for radial conductivities

Thierry Daudé, Fabricio Macià, Cristóbal Meroño +1

The problem of characterizing sequences of real numbers that arise as spectra of Dirichlet-to-Neumann (DtN) maps for elliptic operators has attracted considerable attention over th…

math.AP2024

Global counterexamples to uniqueness for a Calderón problem with $C^{k}$ conductivities

Thierry Daudé, Bernard Helffer, Niky Kamran +1

Let $Ω \subset R^{n}$ , $n \geq 3$ , be a fixed smooth bounded domain, and let $γ$ be a smooth conductivity in $Ω$ . Consider a non-zero frequency $λ_{0}$ which does not belong to…

math.AP2024

Stable factorization of the Calderón problem via the Born approximation

Thierry Daudé, Fabricio Macià, Cristóbal Meroño +1

In this article, we prove the existence of the Born approximation in the context of the radial Calderón problem for Schrödinger operators. The Born approximation naturally appears…

The spectrum of Dirichlet-to-Neumann maps for radial conductivities

Global counterexamples to uniqueness for a Calderón problem with Ck conductivities

Stable factorization of the Calderón problem via the Born approximation

Global counterexamples to uniqueness for a Calderón problem with $C^{k}$ conductivities