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Limiting Carleman weights and anisotropic inverse problems

TLDR
In this article, the authors considered the anisotropic Calderon problem and related inverse problems, and characterized those Riemannian manifolds which admit limiting Carleman weights, and gave a complex geometrical optics construction for a class of such manifolds.
Abstract
In this article we consider the anisotropic Calderon problem and related inverse problems. The approach is based on limiting Carleman weights, introduced in Kenig et al. (Ann. Math. 165:567–591, 2007) in the Euclidean case. We characterize those Riemannian manifolds which admit limiting Carleman weights, and give a complex geometrical optics construction for a class of such manifolds. This is used to prove uniqueness results for anisotropic inverse problems, via the attenuated geodesic ray transform. Earlier results in dimension n≥3 were restricted to real-analytic metrics.

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Tensor tomography on surfaces

TL;DR: In this article, it was shown that on simple surfaces the geodesic ray transform acting on solenoidal symmetric tensor fields of arbitrary order is injective, which solves a long standing inverse problem in the two-dimensional case.
Journal ArticleDOI

An inverse anisotropic conductivity problem induced by twisting a homogeneous cylindrical domain

TL;DR: In this article, the inverse anisotropic conductivity problem remains open, unless the unknown function $\alpha$ is assumed to be constant, in which case Lipschitz stability is established.
Journal ArticleDOI

Unique continuation for the Helmholtz equation using stabilized finite element methods

TL;DR: In this article, the authors considered the computational approximation of a unique continuation problem for the Helmholtz equation using a stabilized finite element method and derived conditional stability estimates for which, under a convexity assumption on the geometry, the constants grow at most linearly in the wave number.
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Stable determination of coefficients in the dynamical Schr\"odinger equation in a magnetic field

TL;DR: In this paper, the inverse problem of determining the electric potential or magnetic field in a Schrodinger equation with Dirichlet data from measured Neumann boundary observations was considered, and it was shown that the knowledge of the Dirichelet-to-Neumann map for the Schroffinger equation uniquely determines the magnetic field and the electrical potential.
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Inverse problem for wave equation with sources and observations on disjoint sets

TL;DR: In this paper, the restricted Dirichlet-to-Neumann operator was used to determine the Riemannian manifold and the metric on it up to an isometry.
References
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BookDOI

The Analysis of Linear Partial Differential Operators I

TL;DR: In this article, the analysis of linear partial differential operators i distribution theory and fourier rep are a good way to achieve details about operating certain products using instruction manuals, which are clearlybuilt to give step-by-step information about how you ought to go ahead in operating certain equipments.
Book

Riemannian Geometry

Book

Riemannian geometry and geometric analysis

Jürgen Jost
TL;DR: A very readable introduction to Riemannian geometry and geometric analysis can be found in this paper, where the author focuses on using analytic methods in the study of some fundamental theorems in Riemmannian geometry, e.g., the Hodge theorem, the Rauch comparison theorem, Lyusternik and Fet theorem and the existence of harmonic mappings.
Journal ArticleDOI

A global uniqueness theorem for an inverse boundary value problem

TL;DR: In this paper, the single smooth coefficient of the elliptic operator LY = v yv can be determined from knowledge of its Dirichlet integrals for arbitrary boundary values on a fixed region 2 C R', n? 3.
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