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- W2082772417 abstract "The use of preconditioned iterative methods to solve a system of equations with a Toeplitz-plus-Hankel coefficient matrix is studied. A new preconditioner suitable for Toeplitz-plus-Hankel matrices is proposed, and the spectral properties of reconditioned rational Toeplitz-plus-Hankel matrices are examined. It is shown that the eigenvalues of the preconditioned matrix are clustered around unity, except for a finite number of outliers, depending on the orders of the rational generating functions, and the clustering radius is proportional to the magnitude of the last elements in Toeplitz and Hankel matrices. With the spectral regularities, an $N times N$ rational Toeplitz-plus-Hankel system can be solved by preconditioned iterative methods with $O(Nlog N)$ operations. Numerical experiments are given to demonstrate the efficiency of the proposed preconditioner." @default.
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- W2082772417 date "1993-06-01" @default.
- W2082772417 modified "2023-10-01" @default.
- W2082772417 title "Preconditioned Iterative Methods for Solving Toeplitz-Plus-Hankel Systems" @default.
- W2082772417 doi "https://doi.org/10.1137/0730042" @default.
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