A note on improvement on bounds for nonmaximal eigenvalues of symmetric positive matrices
β Scribed by Xiao-Qin Liu; Ting-Zhu Huang; Ying-Ding Fu
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 95 KB
- Volume
- 419
- Category
- Article
- ISSN
- 0024-3795
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β¦ Synopsis
In this work, we improve the lower and upper bounds obtained by Zhang and Luo [X. Zhang, R. Luo, Upper bound for the non-maximal eigenvalues of irreducible nonnegative matrices, Czechoslovak Math. J. 52 (127) (2002) 537-544] for the nonmaximal eigenvalue Ξ» n-1 (A) of a symmetric positive matrix.
π SIMILAR VOLUMES
be Hermitian matrices with eigenvalues Ξ» 1 β’ β’ β’ Ξ» k and Ξ» 1 β’ β’ β’ Ξ» k , respectively. Denote by E the spectral norm of the matrix E, and Ξ· the spectral gap between the spectra of H 1 and H 2 . It is shown that , which improves all the existing results. Similar bounds are obtained for singular valu