Perturbation of Browder spectrum of upper triangular operator matrices

Perturbation of Browder spectrum of upper triangular operator matrices
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上三角算子矩阵的Browder谱的摄动

DOI:
10.1080/03081087.2015.1050349
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发表时间:
2013-12
影响因子:
1.1
通讯作者:
Zhong, Huaijie
Zhong, Huaijie
中科院分区:
数学3区
文献类型:
--
作者:
Zhang, Shifang;Zhang, Lin;Zhong, Huaijie

文献摘要

参考文献

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设是作用在Banach空间或Hilbert空间上的2×2上三角算子矩阵。对于最重要的谱,如谱、本质谱和Weyl谱,给出了On Banach空间上的扰动的刻画。然而,Banach空间上Browder谱的刻画仍是未知的。本文的目的是利用基于算子的矩阵表示和幻影指数定理的另一种方法,给出某些人是Browder的一些充要条件。此外,在Hilbert空间中,还给出了Browder谱的Fredholm型和可逆型扰动的刻画。
Let be a 2-by-2 upper triangular operator matrix acting on the Banach space or Hilbert space . For the most important spectra such as spectrum, essential spectrum and Weyl spectrum, the characterizations of the perturbations of on Banach space have been presented. However, the characterization for the Browder spectrum on the Banach space is still unknown. The goal of this paper is to present some necessary and sufficient conditions for to be Browder for some using an alternative approach based on matrix representation of operators and the ghost index theorem. Moreover, in the Hilbert space case, the characterizations of the Fredholm and invertible perturbations of Browder spectrum are also given.
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关于算子矩阵的布劳德谱的注解
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