Local adaption for approximation and minimization of univariate functions
Local adaption for approximation and minimization of univariate functions
复制标题
单变量函数的逼近和最小化的局部自适应
DOI:
10.1016/j.jco.2016.11.005
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发表时间:
2017
影响因子:
1.7
通讯作者:
Tong, Xin
中科院分区:
文献类型:
--
作者:
Choi, Sou-Cheng T.;Ding, Yuhan;Hickernell, Fred J.;Tong, Xin
Most commonly used adaptive algorithms for univariate real-valued function approximation and global minimization lack theoretical guarantees. Our new locally adaptive algorithms are guaranteed to provide answers that satisfy a user-specified absolute error tolerance for a cone, C, of non-spiky input functions in the Sobolev space W 2,∞[a, b]. Our algorithms automatically determine where to sample the function—sampling more densely where the second derivative is larger. The computational cost of our algorithm for approximating a univariate function f on a bounded interval with L∞-error no greater than ε is O (‖ f ″‖ 1 2/ε) as ε→ 0. This is the same order as that of the best function approximation algorithm for functions in C. The computational cost of our global minimization algorithm is of the same order and the cost can be substantially less if f significantly exceeds its minimum over much of the domain. Our Guaranteed Automatic Integration Library (GAIL) contains these new algorithms. We provide numerical experiments to illustrate their superior performance.
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DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
X. Tong
通讯作者:
X. Tong
DOI:
10.1007/978-3-319-33507-0_18
发表时间:
2014
期刊:
arXiv: Numerical Analysis
影响因子:
--
作者:
F. J. Hickernell;Lluís Antoni Jiménez Rugama
通讯作者:
Lluís Antoni Jiménez Rugama
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Lan Jiang
通讯作者:
Lan Jiang
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Yuhan Ding
通讯作者:
Yuhan Ding
影响因子:
2.1
作者:
L. Plaskota
通讯作者:
L. Plaskota