On the partial condition numbers for the indefinite least squares problem
On the partial condition numbers for the indefinite least squares problem
复制标题
关于不定最小二乘问题的部分条件数
DOI:
10.1016/j.apnum.2017.09.006
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发表时间:
2016-05
影响因子:
2.8
通讯作者:
Wang Shaoxin
中科院分区:
文献类型:
--
作者:
Li Hanyu;Wang Shaoxin
The condition number of a linear function of the indefinite least squares solution is called the partial condition number for the indefinite least squares problem. In this paper, based on a new and very general condition number which can be called the unified condition number, we first present an expression of the partial unified condition number when the data space is measured by a general weighted product norm. Then, by setting the specific norms and weight parameters, we obtain the expressions of the partial normwise, mixed and componentwise condition numbers. Moreover, the corresponding structured partial condition numbers are also taken into consideration when the problem is structured. Considering the connections between the indefinite and total least squares problems, we derive the (structured) partial condition numbers for the latter, which generalize the ones in the literature. To estimate these condition numbers effectively and reliably, the probabilistic spectral norm estimator and the small-sample statistical condition estimation method are applied and three related algorithms are devised. Finally, the obtained results are illustrated by numerical experiments.
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DOI:
10.1090/s0025-5718-06-01913-2
发表时间:
2006-11
期刊:
Math. Comput.
影响因子:
--
作者:
F. Cucker;H. Diao;Yimin Wei-
通讯作者:
F. Cucker;H. Diao;Yimin Wei-
DOI:
10.1007/978-3-642-38896-5
发表时间:
2013-08
期刊:
--
影响因子:
--
作者:
Peter Bürgisser;F. Cucker
通讯作者:
Peter Bürgisser;F. Cucker
影响因子:
2.1
作者:
A. Geurts
通讯作者:
A. Geurts
DOI:
10.1137/s0895479802405732
发表时间:
2003
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
作者:
S. Rump
通讯作者:
S. Rump
影响因子:
2.5
作者:
M. Hochstenbach
通讯作者:
M. Hochstenbach