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- W1988008883 abstract "In this paper, we propose a new type of preconditioners for solving finite section Wiener-Hopf integral equations (αI + Aτ)xτ = g by the preconditioned conjugate gradient algorithm. We show that for an integer u > 1, the operator αI + Aτ> can be decomposed into a sum of operators αI + Pτ(u,v) for 0 ≤ v < u. Here Pτ(u,v) are gwvcirculant matrices. For u - 1, our preconditioners are defined as (1u)∑v(αI+Pτ(u,v))−1. Thus the way the preconditioners are constructed is very similar to the approach used in the additive Schwarz method for elliptic problems. As for the convergence rate, we prove that the spectra of the resulting preconditioned operators (1u)∑v(αI+Pτ(u,v))−1][αI+Aτ are clustered around 1 and thus the algorithm converges sufficiently fast. Finally, we discretize the resulting preconditioned equations by rectangular rule. Numerical results show that our methods converges faster than those preconditioned by using circulant integral operators." @default.
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- W1988008883 date "1995-09-01" @default.
- W1988008883 modified "2023-10-01" @default.
- W1988008883 title "Construction of preconditioners for Wiener-Hopf equations by operator splitting" @default.
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- W1988008883 doi "https://doi.org/10.1016/0096-3003(94)00178-7" @default.
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