摘要
In this paper,we present a kind of pre-symmetrizers for the nonsymmetric linear systems arising from the discretization of nonself-adjoint second order scalar elliptic equation.Based on combination these pre-symmetrizers with CG method, the new algorithm, LRSCG algorithm, is presented.The numerical results show that the LRSCG algorithm is better than BiCG, CGS, BiCGSTAB, GMRES, QMR and SGMRES methods for thses nonsymmetric linear systems.
In this paper,we present a kind of pre-symmetrizers for the nonsymmetric linear systems arising from the discretization of nonself-adjoint second order scalar elliptic equation.Based on combination these pre-symmetrizers with CG method, the new algorithm, LRSCG algorithm, is presented.The numerical results show that the LRSCG algorithm is better than BiCG, CGS, BiCGSTAB, GMRES, QMR and SGMRES methods for thses nonsymmetric linear systems.
出处
《数值计算与计算机应用》
CSCD
北大核心
2001年第1期71-80,共10页
Journal on Numerical Methods and Computer Applications
基金
中国 863(863-306-ZD11-03-1
863-306-ZD01-03-2)项目
中国 973(G199903280
关键词
非对称线性方程组
数值计算
新迭代算法
pre-symmetrizers, nonsymmetric linear system, LRSCG algo- rithm
