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- W3132389145 abstract "In this paper, we focus on solving a class of two-by-two block complex system of linear equations arising from finite element discretization of a distributed optimal control constrained by a time-harmonic parabolic equations. We propose a new iterative method for solving the obtained system. In each iteration of the method a two-by-two block system of linear equations with real coefficient matrix should be solved. We solve this system inexactly using the generalized minimal residual (GMRES) and the Chebyshev acceleration methods in conjunction with the real-valued preconditioned square block (PRESB) preconditioner. The convergence and spectral properties of the method are discussed. Numerical results in 2-dimensional case are presented to demonstrate the efficiency of the method." @default.
- W3132389145 created "2021-03-01" @default.
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- W3132389145 date "2021-07-01" @default.
- W3132389145 modified "2023-10-14" @default.
- W3132389145 title "A new iterative method for solving the systems arisen from finite element discretization of a time-harmonic parabolic optimal control problems" @default.
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- W3132389145 doi "https://doi.org/10.1016/j.matcom.2021.02.013" @default.
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