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arXiv 0709.2171math.APmath.DG
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闭流形上的谱反问题

Inverse spectral problems on a closed manifold

Katsiaryna Krupchyk, Yaroslav Kurylev, Matti Lassas

摘要:

本文考虑连通闭黎曼流形$(M,g)$上的两个反问题。第一个问题是Gel'fand逆边界谱问题的直接模拟。为了公式化它,假设$M$被一个超曲面$Σ$分成两个分量,我们知道$(M,g)$上拉普拉斯算子的本征值$λ_j$,也知道$Σ$上相应本征函数$ϕ_j$的柯西数据,即$ϕ_j|_Σ,\partial_νϕ_j|_Σ$,其中$ν$是$Σ$的法线。我们证明,这些数据确定$(M,g)$唯一的,即达到等距。在第二个问题中,我们得到的数据要少得多,即只有$λ_j$和$ϕ_j|_Σ$。然而,如果$Σ$由至少两个分量$Σ_1, Σ_2$组成,我们仍然能够确定$(M,g)$,假设关于$M$和$Σ$的某些条件。这些条件是用沿着$Σ_i$,$i=1,2$切割$M$得到的边界流形的谱来表示的,并且具有一般性质。我们还考虑了与上述相关的$M$上的一些其他逆问题,其中数据比所描述的光谱数据更容易从测量中获得。

英文摘要:

In this paper we consider two inverse problems on a closed connected Riemannian manifold $(M,g)$. The first one is a direct analog of the Gel'fand inverse boundary spectral problem. To formulate it, assume that $M$ is divided by a hypersurface $Σ$ into two components and we know the eigenvalues $λ_j$ of the Laplace operator on $(M,g)$ and also the Cauchy data, on $Σ$, of the corresponding eigenfunctions $ϕ_j$, i.e. $ϕ_j|_Σ,\partial_νϕ_j|_Σ$, where $ν$ is the normal to $Σ$. We prove that these data determine $(M,g)$ uniquely, i.e. up to an isometry. In the second problem we are given much less data, namely, $λ_j$ and $ϕ_j|_Σ$ only. However, if $Σ$ consists of at least two components, $Σ_1, Σ_2$, we are still able to determine $(M,g)$ assuming some conditions on $M$ and $Σ$. These conditions are formulated in terms of the spectra of the manifolds with boundary obtained by cutting $M$ along $Σ_i$, $i=1,2$, and are of a generic nature. We consider also some other inverse problems on $M$ related to the above with data which is easier to obtain from measurements than the spectral data described.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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