Low-rank approximation of integral operators by using the Green formula and quadrature
Low-rank approximation of integral operators by using the Green formula and quadrature
复制标题
使用格林公式和求积的积分算子的低阶近似
DOI:
10.1007/s11075-012-9679-2
复制
发表时间:
2013
影响因子:
2.1
通讯作者:
J. Gördes
中科院分区:
文献类型:
--
作者:
S. Börm;J. Gördes
Approximating integral operators by a standard Galerkin discretisation typically leads to dense matrices. To avoid the quadratic complexity it takes to compute and store a dense matrix, several approaches have been introduced including-matrices. The kernel function is approximated by a separable function, this leads to a low rank matrix. Interpolation is a robust and popular scheme, but requires us to interpolate in each spatial dimension, which leads to a complexity offor-th order. Instead of interpolation we propose using quadrature on the kernel function represented with Green’s formula. Due to the fact that we are integrating only over the boundary, we save one spatial dimension compared to the interpolation method and get a complexity of.
DOI:
10.1137/0913055
发表时间:
1992
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
C. R. Anderson
通讯作者:
C. R. Anderson
影响因子:
3.7
作者:
W. Hackbusch;B. Khoromskij
通讯作者:
B. Khoromskij