arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0907.3859math.SPcs.NAmath.NA
收藏

具有非奇异首项系数的多项式特征值问题的条件数

On condition numbers of polynomial eigenvalue problems with nonsingular leading coefficients

National Technical University of Athens(雅典国立技术大学)

Nikolaos Papathanasiou, Panayiotis Psarrakos

AI总结:

研究具有非奇异首项系数的矩阵多项式特征值问题的条件数,推广经典矩阵扰动理论,建立特征值条件数与伪谱增长率的关系,并给出不涉及特征向量的条件数新表达式及Elsner型扰动界。

摘要:

本文研究了具有非奇异首项系数的矩阵多项式特征值问题的条件数,推广了矩阵扰动理论的经典结果。我们给出了特征值条件数与伪谱增长率之间的关系。我们得到,如果矩阵多项式的单特征值在某些方面是病态的,那么它接近于多重特征值,并构造了该距离(以欧几里得范数度量)的上界。我们还推导了单特征值条件数的一个新表达式,该表达式不涉及特征向量。此外,给出了矩阵多项式的Elsner型扰动界。

英文摘要:

In this paper, we investigate condition numbers of eigenvalue problems of matrix polynomials with nonsingular leading coefficients, generalizing classical results of matrix perturbation theory. We provide a relation between the condition numbers of eigenvalues and the pseudospectral growth rate. We obtain that if a simple eigenvalue of a matrix polynomial is ill-conditioned in some respects, then it is close to be multiple, and we construct an upper bound for this distance (measured in the euclidean norm). We also derive a new expression for the condition number of a simple eigenvalue, which does not involve eigenvectors. Moreover, an Elsner-like perturbation bound for matrix polynomials is presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑