Fast inversion of triangular Toeplitz matrices
Fast inversion of triangular Toeplitz matrices
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DOI:
10.1016/j.tcs.2004.01.005
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发表时间:
2004-05
期刊:
影响因子:
--
通讯作者:
F. Lin;W. Ching;M. Ng
中科院分区:
文献类型:
--
作者:
F. Lin;W. Ching;M. Ng
In this paper, we present an approximate inversion method for triangular Toeplitz matrices based on trigonometric polynomial interpolation. To obtain an approximate inverse of high accuracy for a triangular Toeplitz matrix of size n, our algorithm requires two fast Fourier transforms (FFTs) and one fast cosine transform of 2n-vectors. We then revise the approximate method proposed by Bini (SIAM J. Comput. 13 (1984) 268). The complexity of the revised Bini algorithm is two FFTs of 2n-vectors.