Structured Eigenvalue Condition Numbers
Please always quote using this URN:urn:nbn:de:0296-matheon-2451
- This paper investigates the effect of structure-preserving perturbations on the eigenvalues of linearly and nonlinearly structured eigenvalue problems. Particular attention is paid to structures that form Jordan algebras, Lie algebras, and automorphism groups of a scalar product. Bounds and computable expressions for structured eigenvalue condition numbers are derived for these classes of matrices, which include complex symmetric, pseudo symmetric, persymmetric, skewsymmetric, Hamiltonian, symplectic, and orthogonal matrices. In particular we show that under mild assumptions on the scalar product, the structured and unstructured eigenvalue condition numbers are equal for structures in Jordan algebras. For Lie algebras, the effect on the condition number of incorporating structure varies greatly with the structure. We identify Lie algebras for which structure does not affect the eigenvalue condition number.
Author: | Michael Karow, Daniel Kressner, Francoise Tisseur |
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URN: | urn:nbn:de:0296-matheon-2451 |
Referee: | Volker Mehrmann |
Document Type: | Preprint, Research Center Matheon |
Language: | English |
Date of first Publication: | 2005/05/04 |
Release Date: | 2005/05/04 |
Preprint Number: | 234 |