The Singular Value Behavior of the Finite Sections of Block Toeplitz Operators

The Singular Value Behavior of the Finite Sections of Block Toeplitz Operators
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分块Toeplitz算子有限段的奇异值行为

DOI:
10.1137/s0895479804441973
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发表时间:
2005
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
通讯作者:
A. Rogozhin
A. Rogozhin
中科院分区:
--
文献类型:
--
作者:
A. Rogozhin

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本文讨论了具有连续矩阵值母函数a的块Toeplitz算子T(a)的有限截面奇异值的渐近分布。在这里,有限截面Tn(a)= Pn T(a)Pn的奇异值的k-分裂性质起着重要的作用。我们证明了奇异值sk + 1(Tn(a))趋于$min(\|T(a)^{+}\|^{-1},\|T(\widetilde{a})^{+}\|^{-1})$为$n \rightarrow \infty,$其中k表示分裂数.此外,我们估计的速度,这种收敛的光滑生成函数。
In this paper we discuss the asymptotic distribution of the singular values of the finite sections for a block Toeplitz operator T(a) with continuous matrix-valued generating function a. Here the k-splitting property of the singular values of the finite sections Tn(a) = Pn T(a) Pn plays an important role. We show that the singular values sk + 1(Tn(a)) tend to $\min(\|T(a)^{+}\|^{-1}, \|T(\widetilde{a})^{+}\|^{-1} )$ as $n \rightarrow \infty,$ where k stands for the splitting number. Moreover, we estimate the speed of this convergence for a smooth generating function a.