A new alternating positive semidefinite splitting preconditioner for saddle point problems from time-harmonic eddy current models

A new alternating positive semidefinite splitting preconditioner for saddle point problems from time-harmonic eddy current models
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时谐涡流模型鞍点问题的新型交替正半定分裂预处理器

DOI:
10.1007/s11464-018-0679-y
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发表时间:
2016-04
影响因子:
--
通讯作者:
Zhiru Ren
Zhiru Ren
中科院分区:
数学4区
文献类型:
--
作者:
Yifen Ke;Changfeng Ma;Zhiru Ren

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基于鞍点矩阵的特殊半正定分裂,我们提出了一种新的鞍点问题的交替半正定分裂(APSS)迭代方法,该迭代方法是对时间谐涡流问题混合格式的有限元离散所产生的。我们证明了新的APSS迭代法对于简单拓扑和一般拓扑都是无条件收敛的。新的APSS矩阵可以作为预条件,加快Krylov子空间方法的收敛速度。数值结果表明,新的APSS预处理器优于现有的预处理器。
Based on the special positive semidefinite splittings of the saddle point matrix, we propose a new alternating positive semidefinite splitting (APSS) iteration method for the saddle point problem arising from the finite element discretization of the hybrid formulation of the time-harmonic eddy current problem. We prove that the new APSS iteration method is unconditionally convergent for both cases of the simple topology and the general topology. The new APSS matrix can be used as a preconditioner to accelerate the convergence rate of Krylov subspace methods. Numerical results show that the new APSS preconditioner is superior to the existing preconditioners.
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