Higher Order Fréchet Derivatives of Matrix Functions and the Level-2 Condition Number
Higher Order Fréchet Derivatives of Matrix Functions and the Level-2 Condition Number
复制标题
矩阵函数的高阶 Fréchet 导数和 2 级条件数
DOI:
10.1137/130945259
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发表时间:
2014
影响因子:
1.5
通讯作者:
Higham N
中科院分区:
文献类型:
--
作者:
Higham N
The Fréchet derivativeof a matrix functioncontrols the sensitivity of the function to small perturbations in the matrix. While much is known about the properties ofand how to compute it, little attention has been given to higher order Fréchet derivatives. We derive sufficient conditions for theth Fréchet derivative to exist and be continuous in its arguments and we develop algorithms for computing theth derivative and its Kronecker form. We analyze the level-2 absolute condition number of a matrix function (``the condition number of the condition number'') and bound it in terms of the second Fréchet derivative. For normal matrices and the exponential we show that in the 2-norm the level-1 and level-2 absolute condition numbers are equal and that the relative condition numbers are within a small constant factor of each other. We also obtain an exact relationship between the level-1 and level-2 absolute condition numbers for the matrix inverse and arbitrary nonsingular matrices, as well as a weaker connection for Hermitian matrices for a class of functions that includes the logarithm and square root. Finally, the relation between the level-1 and level-2 condition numbers is investigated more generally through numerical experiments.
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影响因子:
1.3
作者:
Ben Jeuris;R. Vandebril;Bart Vandereycken
通讯作者:
Ben Jeuris;R. Vandebril;Bart Vandereycken
影响因子:
0.5
作者:
M. Nashed
通讯作者:
M. Nashed
影响因子:
1.8
作者:
B. García;C. Santamaría;G. Rubio;J. Pontones
通讯作者:
J. Pontones
DOI:
10.1137/s0895479895283409
发表时间:
1996
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
作者:
R. Mathias
通讯作者:
R. Mathias
影响因子:
3.1
作者:
Higham N
通讯作者:
Higham N