On Preconditioners Based on HSS for the Space Fractional CNLS Equations
On Preconditioners Based on HSS for the Space Fractional CNLS Equations
复制标题
基于HSS的空间分数阶CNLS方程预条件子研究
DOI:
10.4208/eajam.190716.051116b
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发表时间:
2017-02
影响因子:
1.2
通讯作者:
Wang Dong Ling
中科院分区:
文献类型:
--
作者:
Ran Yu Hong;Wang Jun Gang;Wang Dong Ling
The space fractional coupled nonlinear Schrodinger (CNLS) equations are discretized by an implicit conservative difference scheme with the fractional centered difference formula, which is unconditionally stable. The coefficient matrix of the discretized linear system is equal to the sum of a complex scaled identity matrix which can be written as the imaginary unit times the identity matrix and a symmetric Toeplitz-plusdiagonal matrix. In this paper, we present new preconditioners based on Hermitian and skew-Hermitian splitting (HSS) for such Toeplitz-like matrix. Theoretically, we show that all the eigenvalues of the resulting preconditioned matrices lie in the interior of the disk of radius 1 centered at the point (1,0). Thus Krylov subspace methods with the proposed preconditioners converge very fast. Numerical examples are given to illustrate the effectiveness of the proposed preconditioners.
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影响因子:
3.7
作者:
Zhong-Zhi Bai;M. Benzi;Fang Chen
通讯作者:
Zhong-Zhi Bai;M. Benzi;Fang Chen
影响因子:
2.4
作者:
Laskin, N
通讯作者:
Laskin, N
DOI:
10.1137/s0895479801395458
发表时间:
2003-01-01
影响因子:
1.5
作者:
Bai, ZZ;Golub, GH;Ng, MK
通讯作者:
Ng, MK
DOI:
10.1137/080720280
发表时间:
2010-04
期刊:
SIAM J. Scientific Computing
影响因子:
--
作者:
M.K. Ng;J.Y. Pan
通讯作者:
J.Y. Pan
影响因子:
3.1
作者:
Pan Jianyu;Ke Rihuan;Ng Michael K.;Sun Hai-Wei
通讯作者:
Sun Hai-Wei