Author

D. K. Salkuyeh

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Preprint Sep 2026

A parameterized block LU preconditioning for double saddle point problems

We present a biparametric preconditioning technique for large, sparse, non-symmetric, and non-singular double saddle point problems. The preconditioner is induced using a stationary iteration method. It is also based on a two-parameterized block LU factorization of the coefficient matrix. To begin with, some convergenc...

Hamed Aslani, M. Kalyani, D. K. Salkuyeh · 0 citations

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 · 0 citations