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arXiv 2009.10280math.APmath-phmath.MP
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共形横各向异性流形上Calderón问题的重构

Reconstruction in the Calderón problem on conformally transversally anisotropic manifolds

Ali Feizmohammadi, Katya Krupchyk, Lauri Oksanen, Gunther Uhlmann

AI总结:

本文在共形横各向异性流形上,利用高斯波束拟模构造复几何光学解,从Dirichlet-to-Neumann映射构造性重构连续势,给出Calderón问题的构造性解法。

摘要:

我们证明,在维度$\geq 3$的共形横各向异性流形上,若横向流形上的测地线射线变换是可构造性地可逆的,则连续势$q$可以从Schrödinger算子$-\Delta_g+q$的Dirichlet-to-Neumann映射的知识中构造性地确定。这是Dos Santos Ferreira-Kurylev-Lassas-Salo唯一性结果的构造性对应。在我们的重构过程中,一个关键角色是由基于高斯波束拟模的合适复几何光学解的边界迹的构造性确定所扮演的,这些拟模集中在横向流形上的非切向测地线附近,并具有唯一性性质。这是通过将Nachman-Street方法的简化版本应用于我们的设置来实现的。我们还将Nachman-Street引入的主空间与流形边界上的标准Sobolev空间等同起来。我们结果证明中的另一个要素是从Dirichlet-to-Neumann映射的知识中重构连续势的边界迹的重构公式。

英文摘要:

We show that a continuous potential $q$ can be constructively determined from the knowledge of the Dirichlet-to-Neumann map for the Schrödinger operator $-Δ_g+q$ on a conformally transversally anisotropic manifold of dimension $\geq 3$, provided that the geodesic ray transform on the transversal manifold is constructively invertible. This is a constructive counterpart of the uniqueness result of Dos Santos Ferreira-Kurylev-Lassas-Salo. A crucial role in our reconstruction procedure is played by a constructive determination of the boundary traces of suitable complex geometric optics solutions based on Gaussian beams quasimodes concentrated along non-tangential geodesics on the transversal manifold, which enjoy uniqueness properties. This is achieved by applying the simplified version of the approach of Nachman-Street to our setting. We also identify the main space introduced by Nachman-Street with a standard Sobolev space on the boundary of the manifold. Another ingredient in the proof of our result is a reconstruction formula for the boundary trace of a continuous potential from the knowledge of the Dirichlet-to-Neumann map.

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