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This paper shows global uniqueness in two inverse problems for a fractional conductivity equation: an unknown conductivity in a bounded domain is uniquely determined by measurements of solutions taken in arbitrary open, possibly disjoint…

偏微分方程分析 · 数学 2019-01-11 Giovanni Covi

We characterize partial data uniqueness for the inverse fractional conductivity problem with $H^{s,n/s}$ regularity assumptions in all dimensions. This extends the earlier results for $H^{2s,\frac{n}{2s}}\cap H^s$ conductivities by Covi and…

偏微分方程分析 · 数学 2024-09-10 Jesse Railo , Philipp Zimmermann

We prove uniqueness for Calder\'on's problem with Lipschitz conductivities in higher dimensions. Combined with the recent work of Haberman, who treated the three and four dimensional cases, this confirms a conjecture of Uhlmann. Our proof…

偏微分方程分析 · 数学 2016-03-01 Pedro Caro , Keith Rogers

We consider the impedance tomography problem in the plane. Using Bukhgeim's scattering data for the Dirac problem, we prove that the conductivity is uniquely determined by the Dirichlet-to-Neuman map

数学物理 · 物理学 2017-07-26 Evgeny Lakshtanov , Jorge Tejero , Boris Vainberg

We prove \emph{global} uniqueness for an inverse problem for the fractional conductivity equation on domains that are bounded in one direction. The conductivities are assumed to be isotropic and nontrivial in the exterior of the domain,…

偏微分方程分析 · 数学 2022-04-12 Giovanni Covi , Jesse Railo , Philipp Zimmermann

In this paper we study the inverse conductivity problem with partial data. Moreover, we show that, in dimension $n\geq 3$ the uniqueness of the Calder\'{o}n problem holds for the $C^{1}\bigcap H^{3/2, 2}$ conductivities.

偏微分方程分析 · 数学 2015-06-05 Guo Zhang

We consider the determination of a conductivity function in a two-dimensional domain from the Cauchy data of the solutions of the conductivity equation on the boundary. We prove uniqueness results for this inverse problem, posed by…

偏微分方程分析 · 数学 2016-02-24 Kari Astala , Matti Lassas , Lassi Paivarinta

The classical $\overline \partial$-method has been generalized recently [lnv], [lnv2] to be used in the presence of exceptional points. We apply this generalization to solve Dirac inverse scattering problem with weak assumptions on…

数学物理 · 物理学 2017-10-12 Evgeny Lakshtanov , Boris Vainberg

The unique determination of a measurable conductivity from the Dirichlet-to-Neumann map of the equation $\mathrm{div} (\sigma \nabla u) = 0$ is the subject of this note. A new strategy, based on Clifford algebras and a higher dimensional…

偏微分方程分析 · 数学 2019-06-26 Matteo Santacesaria

We consider the inverse conductivity problem of identifying embedded objects in unbounded domains. The main tool is a set of special solutions to the Schroedinger equation, the complex spherical waves, which are constructed by a Carleman…

偏微分方程分析 · 数学 2009-11-11 Mikko Salo , Jenn-Nan Wang

We prove uniqueness in the inverse conductivity problem for uniformly elliptic conductivities in $W^{s,p}(\Omega)$, where $\Omega \subset \mathbb R^n$ is Lipschitz, $3\leq n \leq 6$, and $s$ and $p$ are such that $ W^{s,p}(\Omega)\not…

偏微分方程分析 · 数学 2015-09-22 Boaz Haberman

We prove a global uniqueness result for the Calder\'{o}n inverse problem for a general quasilinear isotropic conductivity equation on a bounded open set with smooth boundary in dimension $n\ge 3$. Performing higher order linearizations of…

偏微分方程分析 · 数学 2023-05-10 Cătălin I. Cârstea , Ali Feizmohammadi , Yavar Kian , Katya Krupchyk , Gunther Uhlmann

This paper is concerning the inverse conductive scattering of acoustic waves by a bounded inhomogeneous object with possibly embedded obstacles inside. A new uniqueness theorem is proved that the conductive object is uniquely determined by…

偏微分方程分析 · 数学 2026-01-19 Chengyu Wu , Jiaqing Yang

In this paper, we consider the inverse scattering problem associated with an inhomogeneous media with a conductive boundary. First, we discuss the inverse conductivity problem of reconstructing the conductivity parameter from scattering…

偏微分方程分析 · 数学 2017-12-12 Isaac Harris , Andreas Kleefeld

We prove that an $L^\infty$ potential in the Schr\"odinger equation in three and higher dimensions can be uniquely determined from a finite number of boundary measurements, provided it belongs to a known finite dimensional subspace…

偏微分方程分析 · 数学 2019-10-10 Giovanni S. Alberti , Matteo Santacesaria

This article proves the uniqueness for two kinds of inverse problems of identifying fractional orders in diffusion equations with multiple time-fractional derivatives by pointwise observation. By means of eigenfunction expansion and Laplace…

偏微分方程分析 · 数学 2019-04-15 Zhiyuan Li , Masahiro Yamamoto

The Calder\'on problem is an inverse problem with applications to electrical impedance tomography and geophysical prospection. We prove uniqueness in the Calder\'on problem in spatial dimension $n \geq 3$ for scalar conductivities in the…

偏微分方程分析 · 数学 2016-08-30 Clemens Bombach

In this paper, we derive a novel Unique Continuation Principle (UCP) for a system of second-order elliptic PDEs system and apply it to investigate inverse problems in conductive scattering. The UCP relaxes the typical assumptions imposed on…

偏微分方程分析 · 数学 2025-04-30 Huaian Diao , Xiaoxu Fei , Hongyu Liu

We study inverse conductivity problem for an anisotropic conductivity in $L^\infty$ in bounded and unbounded domains. Also, we give applications of the results in the case when Dirichlet-to-Neumann and Neumann-to-Dirichlet maps are given…

偏微分方程分析 · 数学 2007-05-23 Kari Astala , Matti Lassas , Lassi Paivarinta

The aim of the paper is twofold. Firstly, we would like to derive quantitative uniqueness estimates for solutions of the general complex conductivity equation. It is still unknown whether the \emph{strong} unique continuation property holds…

偏微分方程分析 · 数学 2018-10-02 Catalin Carstea , Tu Nguyen , Jenn-Nan Wang
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