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arXiv 1810.09693math.SPmath.FA
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环面上 Neumann--Poincaré 算子的谱结构

Spectral structure of the Neumann--Poincaré operator on tori

Kazunori Ando, Yong-Gwan Ji, Hyeonbae Kang, Daisuke Kawagoe, Yoshihisa Miyanishi

AI总结:

本文证明了环面上的 Neumann--Poincaré 算子具有无穷多个负特征值,通过环面坐标系与 Fourier 基将其分解为无穷多个自伴紧算子并分析其数值域,回答了三维有界区域边界的谱结构问题。

摘要:

我们探讨是否存在一个三维有界区域,使得定义在其边界上的 Neumann--Poincaré 算子具有无穷多个负特征值。本文证明了环面具备这一性质。具体而言,利用环面坐标系和 Fourier 基,将环面上的 Neumann--Poincaré 算子分解为定义在圆周上的 Hilbert 空间中的无穷多个自伴紧算子,并证明该分解中无穷多个算子的数值域同时包含正值和负值,从而得出结论。

英文摘要:

We address the question whether there is a three-dimensional bounded domain such that the Neumann--Poincaré operator defined on its boundary has infinitely many negative eigenvalues. It is proved in this paper that tori have such a property. It is done by decomposing the Neumann--Poincaré operator on tori into infinitely many self-adjoint compact operators on a Hilbert space defined on the circle using the toroidal coordinate system and the Fourier basis, and then by proving that the numerical range of infinitely many operators in the decomposition has both positive and negative values.

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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