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math.NA2022
Convergence Acceleration of Preconditioned CG Solver Based on Error Vector Sampling for a Sequence of Linear Systems
Takeshi Iwashita, Kota Ikehara, Takeshi Fukaya +1
In this paper, we focus on solving a sequence of linear systems with an identical (or similar) coefficient matrix. For this type of problems, we investigate the subspace correction…
math.NA2020★ 5 cited
An Integer Arithmetic-Based Sparse Linear Solver Using a GMRES Method and Iterative Refinement
Takeshi Iwashita, Kengo Suzuki, Takeshi Fukaya
In this paper, we develop a (preconditioned) GMRES solver based on integer arithmetic, and introduce an iterative refinement framework for the solver. We describe the data format f…