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Generalized Accelerated Hermitian and Skew-Hermitian Splitting Methods for Saddle-Point Problems

Published online by Cambridge University Press:  20 February 2017

H. Noormohammadi Pour
Affiliation:
Department of Mathematics, Kerman Branch, Islamic Azad University, Kerman, Iran
H. Sadeghi Goughery*
Affiliation:
Department of Mathematics, Kerman Branch, Islamic Azad University, Kerman, Iran
*
*Corresponding author. Email address:hsadeghi31@yahoo.com (H. Sadeghi Goughery)

Abstract

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We generalize the accelerated Hermitian and skew-Hermitian splitting (AHSS) iteration methods for large sparse saddle-point problems. These methods involve four iteration parameters whose special choices can recover the preconditioned HSS and accelerated HSS iteration methods. Also a new efficient case is introduced and we theoretically prove that this new method converges to the unique solution of the saddle-point problem. Numerical experiments are used to further examine the effectiveness and robustness of iterations.

Information

Type
Research Article
Copyright
Copyright © Global-Science Press 2017