Iterative Methods Based on Soft Thresholding of Hierarchical Tensors
Iterative Methods Based on Soft Thresholding of Hierarchical Tensors
复制标题
基于分层张量软阈值的迭代方法
DOI:
10.1007/s10208-016-9314-z
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发表时间:
2017
影响因子:
3
通讯作者:
R. Schneider
中科院分区:
文献类型:
--
作者:
M. Bachmayr;R. Schneider
We construct a soft thresholding operation for rank reduction in hierarchical tensors and subsequently consider its use in iterative thresholding methods, in particular for the solution of discretized high-dimensional elliptic problems. The proposed method for the latter case adjusts the thresholding parameters, by an a posteriori criterion requiring only bounds on the spectrum of the operator, such that the arising tensor ranks of the resulting iterates remain quasi-optimal with respect to the algebraic or exponential-type decay of the hierarchical singular values of the true solution. In addition, we give a modified algorithm using inexactly evaluated residuals that retains these features. The effectiveness of the scheme is demonstrated in numerical experiments.
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DOI:
10.1090/mcom/3132
发表时间:
2015
期刊:
Math. Comput.
影响因子:
--
作者:
M. Bachmayr;A. Cohen
通讯作者:
A. Cohen
DOI:
10.1090/s0025-5718-2011-02507-x
发表时间:
2012
期刊:
Math. Comput.
影响因子:
--
作者:
S. Dahlke;M. Fornasier;T. Raasch
通讯作者:
T. Raasch
影响因子:
2.9
作者:
M. Bachmayr;W. Dahmen
通讯作者:
W. Dahmen
影响因子:
2.1
作者:
Gandy, Silvia;Recht, Benjamin;Yamada, Isao
通讯作者:
Yamada, Isao