A note on eigenvalues of perturbed Hermitian matrices
A note on eigenvalues of perturbed Hermitian matrices
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DOI:
10.1016/j.laa.2004.08.026
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发表时间:
2005-01
影响因子:
1.1
通讯作者:
Chi-Kwong Li;Ren-Cang Li
中科院分区:
文献类型:
--
作者:
Chi-Kwong Li;Ren-Cang Li
Let be Hermitian matrices with eigenvalues λ1⩾⋯⩾λkand λ∼1⩾⋯⩾λ∼k, respectively. Denote by ∥E∥ the spectral norm of the matrix E, and η the spectral gap between the spectra of H1and H2. It is shown that which improves all the existing results. Similar bounds are obtained for singular values of matrices under block perturbations.