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We consider the inverse problems of for the fractional Schr\"odinger equation by using monotonicity formulas. We provide if-and-only-if monotonicity relations between positive bounded potentials and their associated nonlocal…

偏微分方程分析 · 数学 2019-08-02 Bastian Harrach , Yi-Hsuan Lin

In this paper, we introduce an inverse problem of a Schr\"odinger type variable nonlocal elliptic operator $(-\nabla\cdot(A(x)\nabla))^{s}+q)$, for $0<s<1$. We determine the unknown bounded potential $q$ from the exterior partial…

偏微分方程分析 · 数学 2017-08-24 Tuhin Ghosh , Yi-Hsuan Lin , Jingni Xiao

In this paper, we study an inverse scattering problem associated with the time-harmonic Schr\"odinger equation where both the potential and the source terms are unknown. The source term is assumed to be a generalised Gaussian random…

偏微分方程分析 · 数学 2023-05-16 Hongyu Liu , Shiqi Ma

We consider the unique recovery of a non compactly supported and non periodic perturbation of a Schr\"odinger operator in an unbounded cylindrical domain, also called waveguide, from boundary measurements. More precisely, we prove recovery…

偏微分方程分析 · 数学 2017-09-08 Yavar Kian

We study the uniqueness question for two inverse problems on graphs. Both problems consist in finding (possibly complex) edge or nodal based quantities from boundary measurements of solutions to the Dirichlet problem associated with a…

组合数学 · 数学 2015-10-13 Justin Boyer , Jack J. Garzella , Fernando Guevara Vasquez

A generalized variant of the Calder\'on problem from electrical impedance tomography with partial data for anisotropic Lipschitz conductivities is considered in an arbitrary space dimension $n \geq 2$. The following two results are shown:…

谱理论 · 数学 2012-05-22 Jussi Behrndt , Jonathan Rohleder

This paper investigates the Dirichlet problem for a non-divergence form elliptic operator $L$ in a bounded domain of $\mathbb{R}^d$. Under certain conditions on the coefficients of $L$, we first establish the existence of a unique Green's…

偏微分方程分析 · 数学 2025-04-09 Hongjie Dong , Dong-ha Kim , Seick Kim

We show that an electric potential and magnetic field can be uniquely determined by partial boundary measurements of the Neumann-to-Dirichlet map of the associated magnetic Schr\"{o}dinger operator. This improves upon previous results of…

偏微分方程分析 · 数学 2014-02-19 Francis J. Chung

For a class of Riemannian manifolds with boundary that includes all negatively curved manifolds with strictly convex boundary, we establish H\"older type stability estimates in the geometric inverse problem of determining the electric…

偏微分方程分析 · 数学 2022-07-19 Victor Arnaiz , Colin Guillarmou

For the two dimensional Schr\"odinger equation in a bounded domain, we prove uniqueness of determination of potentials in $W^1_p(\Omega),\,\, p>2$ in the case where we apply all possible Neumann data supported on an arbitrarily non-empty…

数学物理 · 物理学 2012-10-05 O. Imanuvilov , G. Uhlmann , M. Yamamoto

This paper concerns the inverse problem of retrieving a stationary potential for the Schr\"odinger evolution equation in a bounded domain of RN with Dirichlet data and discontinuous principal coefficient a(x) from a single time-dependent…

偏微分方程分析 · 数学 2008-12-18 Lucie Baudouin , Alberto Mercado

We show that the knowledge of the Dirichlet-to-Neumann map on an arbitrary open portion of the boundary of a domain in $\mathbb{R}^n$, $n\ge 2$, for a class of semilinear elliptic equations, determines the nonlinearity uniquely.

偏微分方程分析 · 数学 2019-05-07 Katya Krupchyk , Gunther Uhlmann

The problem of the recovery of a real-valued potential in the two-dimensional Schrodinger equation at positive energy from the Dirichlet-to-Neumann map is considered. It is know that this problem is severely ill-posed and the reconstruction…

偏微分方程分析 · 数学 2013-06-28 Matteo Santacesaria

We examine the stability issue in the inverse problem of determining a scalar potential appearing in the stationary Schr{\"o}dinger equation in a bounded domain, from a partial elliptic Dirichlet-to-Neumann map. Namely, the Dirichlet data…

偏微分方程分析 · 数学 2015-01-09 Mourad Choulli , Yavar Kian , Eric Soccorsi

We consider the inverse problem for the dynamical system with discrete Schr\"odinger operator and discrete time. As an inverse data we take a \emph{response operator}, the natural analog of the dynamical Dirichlet-to-Neumann map. We derive…

偏微分方程分析 · 数学 2025-05-27 A. S. Mikhaylov , A. S. Mikhaylov

We consider a partial data inverse problem with unbounded potentials. Rather than rely on functional analytic arguments or Carleman estimates, we construct an explicit Green's function with which we construct complex geometric optics (CGO)…

偏微分方程分析 · 数学 2025-04-14 Leonard Busch , Leo Tzou

We show that the knowledge of the Dirichlet-to-Neumann maps given on an arbitrary open non-empty portion of the boundary of a smooth domain in $\mathbb{R}^n$, $n\ge 2$, for classes of semilinear and quasilinear conductivity equations,…

偏微分方程分析 · 数学 2020-11-04 Yavar Kian , Katya Krupchyk , Gunther Uhlmann

We consider the Dirichlet-to-Neumann map associated to the Schr\"odinger equation with a potential in a bounded Lipschitz domain in three or more dimensions. We show that the integral of the potential over a two-plane is determined by the…

偏微分方程分析 · 数学 2007-05-23 Allan Greenleaf , Gunther Uhlmann

In this paper we study inverse boundary value problems with partial data for the magnetic Schr\"odinger operator. In the case of an infinite slab in $R^n$, $n\ge 3$, we establish that the magnetic field and the electric potential can be…

偏微分方程分析 · 数学 2015-05-27 Katsiaryna Krupchyk , Matti Lassas , Gunther Uhlmann

In this paper we show uniqueness of the conductivity for the quasilinear Calder\'on's inverse problem. The nonlinear conductivity depends, in a nonlinear fashion, of the potential itself and its gradient. Under some structural assumptions…

偏微分方程分析 · 数学 2018-06-26 Claudio Muñoz , Gunther Uhlmann