Acceleration of contour integration techniques by rational Krylov subspace methods
Acceleration of contour integration techniques by rational Krylov subspace methods
复制标题
通过有理 Krylov 子空间方法加速轮廓积分技术
DOI:
10.1016/j.cam.2016.08.040
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Volker Grimm
中科院分区:
文献类型:
--
作者:
Tanja Göckler;Volker Grimm
We suggest a rational Krylov subspace approximation for products of matrix functions and a vector appearing in exponential integrators. We consider matrices with a field-of-values in a sector lying in the left complex half-plane. The choice of the poles for our method is suggested by a fixed rational approximation based on contour integration along a hyperbola around the sector. Compared to the fixed approximation, our rational Krylov subspace method exhibits an accelerated and more stable convergence of order O (e− C n).
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DOI:
10.1137/12089226x
发表时间:
2013
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
Tanja Göckler;Volker Grimm
通讯作者:
Volker Grimm
影响因子:
3.1
作者:
Mario Berljafa;S. Güttel
通讯作者:
S. Güttel
影响因子:
1.1
作者:
V. Druskin;M. Zaslavsky
通讯作者:
M. Zaslavsky
影响因子:
1.5
作者:
S. Güttel;L. Knizhnerman
通讯作者:
S. Güttel;L. Knizhnerman
影响因子:
1.5
作者:
Volker Grimm
通讯作者:
Volker Grimm