Proxy-GMRES: Preconditioning via GMRES in Polynomial Space
Proxy-GMRES: Preconditioning via GMRES in Polynomial Space
复制标题
Proxy-GMRES:通过多项式空间中的 GMRES 进行预处理
DOI:
10.1137/20m1342562
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发表时间:
2021
影响因子:
1.5
通讯作者:
Saad, Yousef
中科院分区:
文献类型:
--
作者:
Ye, Xin;Xi, Yuanzhe;Saad, Yousef
This paper proposes a class of polynomial preconditioners for solving non-Hermitian linear systems of equations. The polynomial is obtained from a least-squares approximation in polynomial space instead of a standard Krylov subspace. The process for building the polynomial relies on an Arnoldi-like procedure in a small dimensional polynomial space and is equivalent to performing GMRES in polynomial space. It is inexpensive and produces the desired polynomial in a numerically stable way. A few improvements to the basic scheme are discussed including the development of a short-term recurrence and the use of compound preconditioners. Numerical experiments, including a test with challenging nonnormal three-dimensional Helmholtz equations and a few publicly available sparse matrices, are provided to illustrate the performance of the proposed preconditioners.
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影响因子:
3.1
作者:
Ruipeng Li;Yuanzhe Xi;Lucas Erlandson;Y. Saad
通讯作者:
Y. Saad
影响因子:
3.1
作者:
S. Eisenstat;J. Ortega;C. Vaughan
通讯作者:
C. Vaughan
DOI:
10.1137/0913001
发表时间:
1992
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
S. Ashby;T. Manteuffel;J. S. Otto
通讯作者:
S. Ashby;T. Manteuffel;J. S. Otto
影响因子:
1.5
作者:
M. Crouzeix;C. Palencia
通讯作者:
C. Palencia
影响因子:
3.1
作者:
Geoffrey Dillon;V. Kalantzis;Yuanzhe Xi;Y. Saad
通讯作者:
Y. Saad