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      An extension of the I + Smax preconditioner for the Gauss-Seidel method Translated title: Una extensión del precondicionador I + Smax para el método de Gauss-Seidel

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          Abstract

          . A preconditioning technique based on the application of a fixed but arbitrary number of I +Smax steps is proposed. A reduction of the spectral radius of the Gauss-Seidel iteration matrix is theoretically analyzed for diagonally dominant Z-matrices. In particular, it is shown that after a finite number of steps this matrix reduces to null matrix. To illustrate the performance of the proposed technique numerical experiments on a wide variety of matrices are presented. Point and block versions of the preconditioner are numerically studied.

          Translated abstract

          Se propone una técnica de precondicionamiento para el método de Gauss-Seidel basada en la aplicación de una cantidad de pasos arbitrarios pero fijos del precondicionador I+Smax. Se analiza de manera teórica la reducción del radio espectral de la matriz de iteración del método de Gauss-Seidel para Z-matrices diagonalmente dominantes. En particular, se demuestra que después de un número finito de pasos esta matriz se reduce a una matriz nula. Para ilustrar la eficacia de la técnica propuesta se presentan experimentos numéricos para una amplia variedad de matrices. Se estudian numéricamente versiones puntuales y de bloques del precondicionador.

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          Most cited references18

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          Accuracy of mixed and control volume finite element approximations to Darcy velocity and related quantities

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            Improving Jacobi and Gauss-Seidel Iterations

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              Matrix Iterative Analysis

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                Author and article information

                Journal
                rein
                Revista Integración
                Integración - UIS
                Universidad Industrial de Santander (Bucaramanga, Santander, Colombia )
                0120-419X
                2145-8472
                June 2013
                : 31
                : 1
                : 1-14
                Affiliations
                [01] US orgnameUniversity of Puerto Rico orgdiv1Department of Mathematical Sciences Puerto Rico
                Article
                S0120-419X2013000100001 S0120-419X(13)03100101
                f99649d6-4e9b-484b-889c-d546f5731ada

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 23 March 2013
                : 03 December 2012
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 19, Pages: 14
                Product

                SciELO Colombia

                Categories
                Original articles

                Precondicionamiento,método Gauss-Seidel,descomposiciones regulares,precondicionadores de punto y bloque,Preconditioning,Gauss-Seidel method,regular splitting,point and block preconditioners

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