Preconditioned global GPBiCG method for solving saddle point problems with multiple right-hand sides and its convergence analysis

Iranian Journal of Numerical Analysis and Optimization

مقاله 17، دوره 12، شماره 1 - شماره پیاپی 21، خرداد 2022، صفحه 111-129   

نوع مقاله: Research Article

شناسه دیجیتال (DOI): 10.22067/ijnao.2021.71036.1044

نویسندگان

A. Taherian¹؛ F. Toutounian^{* 2}

¹Department of Applied Mathematics, Faculty of Mathematical Sciences, Ferdowsi University of Mashhad, Mashhad, Iran.

²Department of Applied Mathematics, Faculty of Mathematical Sciences, Ferdowsi University of Mashhad, Mashhad, Iran and The Center of Excellence on Modeling and Control Systems, Ferdowsi University of Mashhad, Iran.

چکیده

We propose the preconditioned global generalized product-type method based on the preconditioned global BiCG method to solve nonsymmetric saddle point problems with multiple right-hand sides. We apply an indefinite preconditioner to enhance the convergence rate of the method. We also present some theoretical analysis and discuss the convergence of the PGl-GPBiCG method. Some useful properties of the preconditioned matrix are established. Moreover, we present the bounds for the residual norm of the PGl-GPBiCG method according to the residual norm of the global GMRES method that guarantees convergence. Finally, some numerical examples are presented to show the effciency of the new method in comparison with the preconditioned global BiCGSTAB method, and a comparison with another preconditioner is also provided.
 

کلیدواژه‌ها

Saddle point problems؛ Preconditioned global GPBiCG؛ Indefinite preconditioning؛ Multiple right-hand sides؛ Convergence analysis

مراجع