5 papers
A block triangular preconditioner for a class of three-by-three block saddle point problems
Hamed Aslani, Davod Khojasteh Salkuyeh
This paper deals with solving a class of three-by-three block saddle point problems. The systems are solved by preconditioning techniques. Based on an iterative method, we construc…
Robust iteration methods for complex systems with an indefinite matrix term
Owe Axelsson, Maeddeh Pourbagher, Davod Khojasteh Salkuyeh
Complex valued systems with an indefinite matrix term arise in important applications such as for certain time-harmonic partial differential equations such as the Maxwell's equatio…
A new block diagonal preconditioner for a class of block saddle point problems
Maryam Abdolmaleki, Saeed Karimi, Davod Khojasteh Salkuyeh
We study the performance of a new block preconditioner for a class of block saddle point problems which arise from finite element methods for solving time-dependent Maxw…
A new iterative method for solving a class of two-by-two block complex linear systems
Davod Khojasteh Salkuyeh
We present a stationary iteration method, namely Alternating Symmetric positive definite and Scaled symmetric positive semidefinite Splitting (ASSS), for solving the system of line…
A new preconditioner for elliptic PDE-constrained optimization problems
Hamid Mirchi, Davod Khojasteh Salkuyeh
We propose a preconditioner to accelerate the convergence of the GMRES iterative method for solving the system of linear equations obtained from discretize-then-optimize approach a…