Preprint
Aug 2026
A variant of the block preconditioner for indefinite complex symmetric linear systems
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 distribu...
Mehdi Makhdomi, D. K. Salkuyeh
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