Estimating the number of eigenvalues of linear operators on Banach spaces
Estimating the number of eigenvalues of linear operators on Banach spaces
复制标题
估计 Banach 空间上线性算子的特征值数量
DOI:
10.1016/j.jfa.2014.11.007
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
G. Katriel
中科院分区:
文献类型:
--
作者:
Michael Demuth;M. Hansmann;F. Hanauska;G. Katriel
Let L 0 be a bounded operator on a Banach space, and consider a perturbation L= L 0+ K, where K is compact. This work is concerned with obtaining bounds on the number of eigenvalues of L in subsets of the complement of the essential spectrum of L 0, in terms of the approximation numbers of the perturbing operator K. Our results can be considered as wide generalizations of classical results on the distribution of eigenvalues of compact operators, which correspond to the case L 0= 0. They also extend previous results on operators in Hilbert space. Our method employs complex analysis and a new finite-dimensional reduction, allowing us to avoid using the existing theory of determinants in Banach spaces, which would require strong restrictions on K. Several open questions regarding the sharpness of our results are raised, and an example is constructed showing that there are some essential differences in the possible distribution of eigenvalues of operators in general Banach spaces, compared to the Hilbert space case.
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影响因子:
2.2
作者:
Y. Latushkin;A. Sukhtayev
通讯作者:
A. Sukhtayev
DOI:
10.1007/978-3-0348-0591-9_2
发表时间:
2012
期刊:
arXiv: Spectral Theory
影响因子:
--
作者:
M. Demuth;Marcel Hansmann;G. Katriel
通讯作者:
G. Katriel
影响因子:
1.2
作者:
Marcel Hansmann
通讯作者:
Marcel Hansmann
影响因子:
0.9
作者:
Marcel Hansmann;G. Katriel
通讯作者:
G. Katriel
影响因子:
1
作者:
M. Gil'
通讯作者:
M. Gil'