Karow, Michael, Hinrichsen, Diederich and Pritchard, Anthony J.. (2006) Interconnected systems with uncertain couplings: Explicit formulae for mu-values, spectral value sets, and stability radii. SIAM JOURNAL ON CONTROL AND OPTIMIZATION, 45 (3). pp. 856-884. ISSN 0363-0129

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Abstract

In this paper we study the variation of the spectrum of block-diagonal systems under perturbations of compatible block structure with.xed zero blocks at arbitrarily prescribed locations ("Gershgorin- type perturbations"). We derive explicit and computable formulae for the associated mu-values. The results are then applied to characterize spectral value sets and stability radii for such perturbed systems. By specializing our results to the scalar diagonal case, the classical eigenvalue inclusion theorems of Gershgorin, Brauer, and Brualdi are obtained as corollaries. Moreover it follows that the inclusion regions of Brauer and Brualdi are optimal for the corresponding perturbation structures.

Item Type:	Journal Article
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics Q Science > QA Mathematics
Journal or Publication Title:	SIAM JOURNAL ON CONTROL AND OPTIMIZATION
Publisher:	SIAM PUBLICATIONS
ISSN:	0363-0129
Date:	2006
Volume:	45
Number:	3
Number of Pages:	29
Page Range:	pp. 856-884
Identification Number:	10.1137/050626508
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/33082

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