Schurras: A restricted version of the overlapping Schur complement preconditioner

doi:10.1137/040608350

	Schurras: A restricted version of the overlapping Schur complement preconditioner
	Li, ZZ ; Saad, Y
刊名	SIAM JOURNAL ON SCIENTIFIC COMPUTING
	2006
卷号	27 期号:5 页码:1787-1801
关键词	parallel preconditioning distributed sparse linear systems Schur complement techniques domain decomposition additive Schwarz preconditioner restricted additive Schwarz preconditioner
ISSN号	1064-8275
DOI	10.1137/040608350
英文摘要	This paper presents a preconditioner based on solving approximate Schur complement systems with the overlapping restricted additive Schwarz (RAS) methods. The construction of the preconditioner, called SchurRAS, is as simple as in the standard RAS. The communication requirements for each application of the preconditioning operation are also similar to those of the standard RAS approach. In the particular case when the degree of overlap is one, then SchurRAS and RAS involve exactly the same communication volume per step. In addition, SchurRAS has the same degree of parallelism as RAS. In some numerical experiments with a model problem, the convergence rate of the method was found to be similar to that of the multiplicative Schwarz (MS) method. The Schur-based RAS usually outperforms the standard RAS both in terms of iteration count and CPU time. For a few two-dimensional scaled problems, SchurRAS was about twice as fast as the stardard RAS on 64 processors.
WOS研究方向	Mathematics
语种	英语
出版者	SIAM PUBLICATIONS
WOS记录号	WOS:000235216100016
内容类型	期刊论文
源URL	[http://ir.amss.ac.cn/handle/2S8OKBNM/2886]
专题	中国科学院数学与系统科学研究院
通讯作者	Li, ZZ
作者单位	1.Chinese Acad Sci, Inst Computat Math & Sci Engn Comp, State Key Lab Sci Engn Comp, Beijing 100864, Peoples R China 2.Univ Minnesota, Dept Comp Sci & Engn, Minneapolis, MN 55455 USA
推荐引用方式 GB/T 7714	Li, ZZ,Saad, Y. Schurras: A restricted version of the overlapping Schur complement preconditioner[J]. SIAM JOURNAL ON SCIENTIFIC COMPUTING,2006,27(5):1787-1801.
APA	Li, ZZ,&Saad, Y.(2006).Schurras: A restricted version of the overlapping Schur complement preconditioner.SIAM JOURNAL ON SCIENTIFIC COMPUTING,27(5),1787-1801.
MLA	Li, ZZ,et al."Schurras: A restricted version of the overlapping Schur complement preconditioner".SIAM JOURNAL ON SCIENTIFIC COMPUTING 27.5(2006):1787-1801.