Nonlinear $n$-term approximation of harmonic functions from shifts of the Newtonian kernel
Nonlinear $n$-term approximation of harmonic functions from shifts of the Newtonian kernel
复制标题
牛顿核位移的调和函数的非线性 $n$ 项近似
DOI:
10.1090/tran/8071
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发表时间:
2020
影响因子:
1.3
通讯作者:
Petrushev, Pencho
中科院分区:
文献类型:
--
作者:
Ivanov, Kamen G.;Petrushev, Pencho
A basic building block in classical potential theory is the fundamental solution of the Laplace equation in(Newtonian kernel). The main goal of this article is to study the rates of nonlinear-term approximation of harmonic functions on the unit ballfrom shifts of the Newtonian kernel with poles outsidein the harmonic Hardy spaces. Optimal rates of approximation are obtained in terms of harmonic Besov spaces. The main vehicle in establishing these results is the construction of highly localized frames for Besov and Triebel-Lizorkin spaces on the sphere whose elements are linear combinations of a fixed number of shifts of the Newtonian kernel. References
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DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
K. Ivanov;P. Petrushev
通讯作者:
P. Petrushev
DOI:
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发表时间:
1986
期刊:
影响因子:
--
作者:
A. Pekarskii
通讯作者:
A. Pekarskii
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
G. Kyriazis;P. Petrushev
通讯作者:
P. Petrushev
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
A. Pekarskii
通讯作者:
A. Pekarskii
DOI:
--
发表时间:
1966
期刊:
影响因子:
--
作者:
D. R. Fulkerson
通讯作者:
D. R. Fulkerson