Proxy-GMRES : Preconditioning via GMRES in Polynomial Space
This paper proposes a class of polynomial preconditioners for solving non-Hermitian linear systems of equations. The polynomial is obtained from a least-squares approximation in polynomial space in…
A Power Schur Complement Low-Rank Correction Preconditioner for General Spars…
A parallel preconditioner is proposed for general large sparse linear systems that combines a power series expansion method with low-rank correction techniques. To enhance convergence, a power seri…
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