Some new bounds on the spectral radius of matrices
โ Scribed by Qingbing Liu; Guoliang Chen; Linlin Zhao
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 180 KB
- Volume
- 432
- Category
- Article
- ISSN
- 0024-3795
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โฆ Synopsis
A new lower bound on the smallest eigenvalue ฯ (A B) for the Fan product of two nonsingular M-matrices A and B is given. Meanwhile, we also obtain a new upper bound on the spectral radius ฯ(A โข B) for nonnegative matrices A and B. These bounds improve some results of Huang (2008) [R. Huang, Some inequalities for the Hadamard product and the Fan product of matrices, Linear Algebra Appl. 428 (2008) 1551-1559].
๐ SIMILAR VOLUMES
Given a square, nonnegative, symmetric matrix A, the Rayleigh quotient of a nonnegative vector u under A is given by QA(u)= urAu//uru. We show that QA(~/u o Au ) is not less than QA(u), where ~--denotes coordinatewise square roots and o is the Hadamard product, but that QA(Au) may be smaller than QA