Design of accurate formulas for approximating functions in weighted Hardy spaces by discrete energy minimization
Design of accurate formulas for approximating functions in weighted Hardy spaces by discrete energy minimization
复制标题
通过离散能量最小化加权 Hardy 空间中函数逼近的精确公式设计
DOI:
10.1093/imanum/dry056
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发表时间:
2018
影响因子:
2.1
通讯作者:
Masaaki Sugihara
中科院分区:
文献类型:
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作者:
Ken'ichiro Tanaka;Masaaki Sugihara
We propose a simple and effective method for designing approximation formulas for weighted analytic functions. We consider spaces of such functions according to weight functions expressing the decay properties of the functions. Then we adopt the minimum worst error of the-point approximation formulas in each space for characterizing the optimal sampling points for the approximation. In order to obtain approximately optimal sampling points we consider minimization of a discrete energy related to the minimum worst error. Consequently, we obtain an approximation formula and its theoretical error estimate in each space. In addition, from some numerical experiments, we observe that the formula generated by the proposed method outperforms the corresponding formula derived with sinc approximation, which is near optimal in each space.
DOI:
--
发表时间:
1977
期刊:
影响因子:
--
作者:
S. Haber
通讯作者:
S. Haber
DOI:
10.1006/jath.2001.3618
发表时间:
2001
期刊:
J. Approx. Theory
影响因子:
--
作者:
A. Levin;D. Lubinsky
通讯作者:
D. Lubinsky