Rational Minimax Iterations for Computing the Matrix pth Root
Rational Minimax Iterations for Computing the Matrix pth Root
复制标题
用于计算矩阵 p 根的有理极小极大迭代
DOI:
10.1007/s00365-020-09504-3
复制
发表时间:
2021
影响因子:
2.7
通讯作者:
Gawlik, Evan S.
中科院分区:
文献类型:
--
作者:
Gawlik, Evan S.
In a previous paper by the author, a family of iterations for computing the matrix square root was constructed by exploiting a recursion obeyed by Zolotarev’s rational minimax approximants of the function. The present paper generalizes this construction by deriving rational minimax iterations for the matrixpth root, whereis an integer. The analysis of these iterations is considerably different from the case, owing to the fact that when, rational minimax approximants of the functiondo not obey a recursion. Nevertheless, we show that several of the salient features of the Zolotarev iterations for the matrix square root, including equioscillatory error, order of convergence, and stability, carry over to the case. A key role in the analysis is played by the asymptotic behavior of rational minimax approximants on short intervals. Numerical examples are presented to illustrate the predictions of the theory.
登录
查看更多内容
DOI:
10.2307/3612294
发表时间:
1960-10
期刊:
The Mathematical Gazette
影响因子:
--
作者:
J. Cooper;N. I. Achieser;C. J. Hyman
通讯作者:
J. Cooper;N. I. Achieser;C. J. Hyman
影响因子:
1.5
作者:
Gawlik, Evan S.
通讯作者:
Gawlik, Evan S.
DOI:
10.1137/070699895
发表时间:
2008
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
作者:
R. Byers;Hongguo Xu
通讯作者:
Hongguo Xu
影响因子:
1
作者:
Yingzhou Li;Haizhao Yang
通讯作者:
Haizhao Yang
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
L. Trefethen;M. Gutknecht
通讯作者:
M. Gutknecht