KMS Of Academy of mathematics and systems sciences, CAS
Uzawa methods for a class of block three-by-three saddle-point problems | |
Huang, Na1; Dai, Yu-Hong2,3; Hu, QiYa2,3 | |
2019-09-05 | |
发表期刊 | NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS |
ISSN | 1070-5325 |
页码 | 26 |
摘要 | In this work, we consider numerical methods for solving a class of block three-by-three saddle-point problems, which arise from finite element methods for solving time-dependent Maxwell equations and some other applications. The direct extension of the Uzawa method for solving this block three-by-three saddle-point problem requires the exact solution of a symmetric indefinite system of linear equations at each step. To avoid heavy computations at each step, we propose an inexact Uzawa method, which solves the symmetric indefinite linear system in some inexact way. Under suitable assumptions, we show that the inexact Uzawa method converges to the unique solution of the saddle-point problem within the approximation level. Two special algorithms are customized for the inexact Uzawa method combining the splitting iteration method and a preconditioning technique, respectively. Numerical experiments are presented, which demonstrated the usefulness of the inexact Uzawa method and the two customized algorithms. |
关键词 | inexact Uzawa method saddle-point problem Uzawa method |
DOI | 10.1002/nla.2265 |
语种 | 英语 |
资助项目 | National Postdoctoral Program for Innovative Talents[BX201600182] ; China Postdoctoral Science Foundation[2016M600141] ; Chinese NSF[11631013] ; Chinese NSF[11331012] ; Chinese NSF[71331001] ; Chinese NSF[11971372] ; Key Project of Chinese National Programs for Fundamental Research and Development[2015CB856002] ; National Natural Science Foundation of China[G11571352] |
WOS研究方向 | Mathematics |
WOS类目 | Mathematics, Applied ; Mathematics |
WOS记录号 | WOS:000485829600001 |
出版者 | WILEY |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.amss.ac.cn/handle/2S8OKBNM/35564 |
专题 | 计算数学与科学工程计算研究所 |
通讯作者 | Dai, Yu-Hong |
作者单位 | 1.China Agr Univ, Coll Sci, Dept Appl Math, Beijing, Peoples R China 2.Chinese Acad Sci, Acad Math & Syst Sci, ICMSEC, LSEC, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, Na,Dai, Yu-Hong,Hu, QiYa. Uzawa methods for a class of block three-by-three saddle-point problems[J]. NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS,2019:26. |
APA | Huang, Na,Dai, Yu-Hong,&Hu, QiYa.(2019).Uzawa methods for a class of block three-by-three saddle-point problems.NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS,26. |
MLA | Huang, Na,et al."Uzawa methods for a class of block three-by-three saddle-point problems".NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS (2019):26. |
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