Defining the spectral position of a Neumann domain
Defining the spectral position of a Neumann domain
复制标题
定义诺依曼域的光谱位置
DOI:
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
Sebastian K. Egger
中科院分区:
文献类型:
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作者:
R. Band;G. Cox;Sebastian K. Egger
A Laplacian eigenfunction on a two-dimensional Riemannian manifold provides a natural partition into Neumann domains (a.k.a. Morse-Smale complexes). This partition is generated by gradient flow lines of the eigenfunction -- these bound the so-called Neumann domains. We prove that the Neumann Laplacian $Delta$ defined on a single Neumann domain is self-adjoint and possesses a purely discrete spectrum. In addition, we prove that the restriction of the eigenfunction to any one of its Neumann domains is an eigenfunction of $Delta$. As a comparison, similar statements for a $nodal$ domain of an eigenfunction (with the Dirichlet Laplacian) are basic and well-known. The difficulty here is that the boundary of a Neumann domain may have cusps and cracks, and hence is not necessarily continuous, so standard results about Sobolev spaces are not available.
DOI:
10.1016/j.anihpc.2020.08.001
发表时间:
2021
期刊:
Analyse non linéaire
影响因子:
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作者:
Beck, Margaret;Cox, Graham;Jones, Christopher;Latushkin, Yuri;Sukhtayev, Alim
通讯作者:
Sukhtayev, Alim