双鞍点问题的参数化块LU预条件
A parameterized block LU preconditioning for double saddle point problems
- University of Pisa(比萨大学)
- University of Guilan(吉兰大学)
机构由 AI 辅助整理,请以论文原文为准。
AI总结:
本文提出一种双参数块LU预条件技术,用于大型稀疏非对称非奇异双鞍点问题,结合GMRES方法,数值实验验证其性能良好。
AI中文摘要:
我们提出了一种用于大型、稀疏、非对称且非奇异双鞍点问题的双参数预条件技术。该预条件器通过平稳迭代方法导出,并基于系数矩阵的双参数化块LU分解。首先,推导了迭代方法的一些收敛性结果。此外,给出了预条件矩阵所展现的谱特征。最后,将所提出的预条件器与GMRES方法结合使用。数值结果表明该预条件器具有令人满意的性能。
英文摘要:
We present a biparametric preconditioning technique for large, sparse, non-symmetric, and non-singular double saddle point problems. The preconditioner is induced using a stationary iteration method. It is also based on a two-parameterized block LU factorization of the coefficient matrix. To begin with, some convergence results of the iteration method are derived. Moreover, the spectral features exhibited by the preconditioned matrix are given. Finally, the presented preconditioner is conjuncted with the GMRES method. Numerical results demonstrate the satisfactory performance of the preconditioner.