A splitting preconditioner for saddle point problems
β Scribed by Yang Cao; Mei-Qun Jiang; Ying-Long Zheng
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 243 KB
- Volume
- 18
- Category
- Article
- ISSN
- 1070-5325
- DOI
- 10.1002/nla.772
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## Abstract A class of constraint preconditioners for solving twoβbyβtwo block linear equations with the (1,2)βblock being the transpose of the (2,1)βblock and the (2,2)βblock being zero was investigated in a recent paper of Cao (__Numer. Math.__ 2006; **103**:47β61). In this short note, we extend
Three domain decomposition methods for saddle point problems are introduced and compared. The first two are blockdiagonal and block-triangular preconditioners with diagonal blocks approximated by an overlapping Schwarz technique with positive definite local and coarse problems. The third is an overl