Direct tensor-product solution of one-dimensional elliptic equations with parameter-dependent coefficients
Direct tensor-product solution of one-dimensional elliptic equations with parameter-dependent coefficients
复制标题
具有参数相关系数的一维椭圆方程的直接张量积解
DOI:
10.1016/j.matcom.2017.10.009
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
B. Khoromskij
中科院分区:
文献类型:
--
作者:
S. Dolgov;V. Kazeev;B. Khoromskij
We consider a one-dimensional second-order elliptic equation with a high-dimensional parameter in a hypercube as a parametric domain. Such a problem arises, for example, from the Karhunen–Loève expansion of a stochastic PDE posed in a one-dimensional physical domain. For the discretization in the parametric domain we use the collocation on a tensor-product grid. The paper is focused on the tensor-structured solution of the resulting multiparametric problem, which allows to avoid the curse of dimensionality owing to the use of the separation of parametric variables in the tensor train and quantized tensor train formats.We suggest an efficient tensor-structured preconditioning of the entire multiparametric family of one-dimensional elliptic problems and arrive at a direct solution formula. We compare this method to a tensor-structured preconditioned GMRES solver in a series of numerical experiments.
DOI:
10.1007/978-3-642-31703-3_2
发表时间:
2013
期刊:
影响因子:
--
作者:
M. Espig;W. Hackbusch;A. Litvinenko;H. G. Matthies;E. Zander
通讯作者:
E. Zander
影响因子:
4.1
作者:
Graham, I. G.;Kuo, F. Y.;Sloan, I. H.
通讯作者:
Sloan, I. H.