The essential spectrum of Neumann Laplacians on some bounded singular domains

The essential spectrum of Neumann Laplacians on some bounded singular domains
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某些有界奇异域上的诺依曼拉普拉斯算子的本质谱

DOI:
10.1016/0022-1236(91)90130-w
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发表时间:
1991
影响因子:
1.7
通讯作者:
B. Simon
B. Simon
中科院分区:
数学1区
文献类型:
--
作者:
R. Hempel;L. Seco;B. Simon

文献摘要

被引文献

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在本文中,我们认为诺依曼拉普拉斯奇异域的类型“房间和通道”或“梳子”,我们表明,在典型的情况下,基本的频谱可以确定的几何数据。此外,给定非负实的任意闭子集S,我们构造域Ω= Ω(S),使得Ω上NeumannLaplacian的本质谱就是这个集合S。
In the present paper we consider Neumann Laplacians on singular domains of the type “rooms and passages” or “combs” and we show that, in typical situations, the essential spectrum can be determined from the geometric data. Moreover, given an arbitrary closed subset S of the non-negative reals, we construct domains Ω= Ω (S) such that the essential spectrum of the Neumann Laplacian on Ω is just this set S.