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Convergence acceleration of preconditioned conjugate gradient solver based on error vector sampling for a sequence of linear systems.
Takeshi Iwashita
Kota Ikehara
Takeshi Fukaya
Takeshi Mifune
Published in:
Numer. Linear Algebra Appl. (2023)
Keyphrases
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linear systems
preconditioned conjugate gradient
sufficient conditions
dynamical systems
convergence rate
coefficient matrix
feature vectors
sparse linear systems
vector space
random sampling
sample size