PreprintCC0arXiv
A variant of the block preconditioner for indefinite complex symmetric linear systems
Abstract
In this paper, we propose an efficient preconditioner for solving indefinite complex symmetric linear systems within a block preconditioning framework. We analyze the convergence of the corresponding iterative method and investigate several spectral properties of the preconditioned matrix, including eigenvalue distributions and eigenvector structures. The new preconditioner is used to accelerate the convergence of the flexible version of GMRES. Numerical experiments are presented to illustrate the effectiveness of the proposed preconditioner, and comparisons with existing block preconditioners demonstrate its superior performance.
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BibTeX
@misc{makhdomi2026variant,
title = {{A variant of the block preconditioner for indefinite complex symmetric linear systems}},
author = {Mehdi Makhdomi and Davod Khojasteh Salkuyeh},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.29985},
eprint = {2608.29985},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.29985},
note = {CC0},
}
RIS
TY - UNPB
TI - A variant of the block preconditioner for indefinite complex symmetric linear systems
AU - Mehdi Makhdomi
AU - Davod Khojasteh Salkuyeh
PY - 2026
DA - 2026/08/30
PB - arXiv
DO - 10.48550/arxiv.2608.29985
UR - https://arxiv.org/abs/2608.29985
AB - In this paper, we propose an efficient preconditioner for solving indefinite complex symmetric linear systems within a block preconditioning framework. We analyze the convergence of the corresponding iterative method and investigate several spectral properties of the preconditioned matrix, including eigenvalue distributions and eigenvector structures. The new preconditioner is used to accelerate the convergence of the flexible version of GMRES. Numerical experiments are presented to illustrate the effectiveness of the proposed preconditioner, and comparisons with existing block preconditioners demonstrate its superior performance.
ER -