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- W2279865562 abstract "The second-order Arnoldi (SOAR) procedure is an algorithm for computing an orthonormal basis of the second-order Krylov subspace. It has found applications in solving quadratic eigenvalue problems and model order reduction of second-order dynamical systems among others. Unfortunately, the SOAR procedure can be numerically unstable. The two-level orthogonal Arnoldi (TOAR) procedure has been proposed as an alternative to SOAR to cure the numerical instability. In this paper, we provide a rigorous stability analysis of the TOAR procedure. We prove that under mild assumptions, the TOAR procedure is backward stable in computing an orthonormal basis of the associated linear Krylov subspace. The benefit of the backward stability of TOAR is demonstrated by its high accuracy in structure-preserving model order reduction of second-order dynamical systems." @default.
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- W2279865562 date "2016-01-01" @default.
- W2279865562 modified "2023-09-24" @default.
- W2279865562 title "Stability Analysis of the Two-level Orthogonal Arnoldi Procedure" @default.
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- W2279865562 doi "https://doi.org/10.1137/151005142" @default.
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