Perturbation, extraction and refinement of invariant pairs for matrix polynomials
Perturbation, extraction and refinement of invariant pairs for matrix polynomials
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矩阵多项式不变对的扰动、提取和细化
DOI:
10.1016/j.laa.2010.06.029
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发表时间:
2011
影响因子:
1.1
通讯作者:
Betcke T
中科院分区:
文献类型:
--
作者:
Betcke T
Generalizing the notion of an eigenvector, invariant subspaces are frequently used in the context of linear eigenvalue problems, leading to conceptually elegant and numerically stable formulations in applications that require the computation of several eigenvalues and/or eigenvectors. Similar benefits can be expected for polynomial eigenvalue problems, for which the concept of an invariant subspace needs to be replaced by the concept of an invariant pair. Little has been known so far about numerical aspects of such invariant pairs. The aim of this paper is to fill this gap. The behavior of invariant pairs under perturbations of the matrix polynomial is studied and a first-order perturbation expansion is given. From a computational point of view, we investigate how to best extract invariant pairs from a linearization of the matrix polynomial. Moreover, we describe efficient refinement procedures directly based on the polynomial formulation. Numerical experiments with matrix polynomials from a number of applications demonstrate the effectiveness of our extraction and refinement procedures.
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DOI:
10.1137/05064521x
发表时间:
2006
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
作者:
B. Kågström;D. Kressner
通讯作者:
D. Kressner
DOI:
10.1137/060663738
发表时间:
2007-11
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
作者:
N. Higham;Ren-Cang Li;F. Tisseur
通讯作者:
N. Higham;Ren-Cang Li;F. Tisseur
影响因子:
1.1
作者:
T. Kosir
通讯作者:
T. Kosir
DOI:
10.1007/978-3-642-56589-2_3
发表时间:
2001
期刊:
--
影响因子:
--
作者:
W. Beyn;Winfried Kleß;V. Thümmler
通讯作者:
W. Beyn;Winfried Kleß;V. Thümmler
影响因子:
1.1
作者:
L. Grammont;N. Higham;F. Tisseur
通讯作者:
L. Grammont;N. Higham;F. Tisseur