arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.3124math-phmath.MP
收藏

大型Toeplitz矩阵的渐近特征值分布

Asymptotic eigenvalue distribution of large Toeplitz matrices

Seung-Yeop Lee, Hui Dai, Eldad Bettelheim

摘要:

研究了由奇异符号生成的Toeplitz矩阵的渐近特征值分布。Widom已经证明,对于一般符号,特征值收敛于符号的图像。在本文中,我们问的特征值如何收敛到图像。对于一个给定的Toeplitz矩阵$T_n(a)$的大小$n$,我们采取标准的方法来看待$\det(ζ-T_n(a))$,其中的渐近信息是由费舍尔-哈特维希定理。对于一个单跳符号,我们得到的本征值的分布作为一个扩展涉及$1/n$和$\log n/n$。为了证明我们的结果的有效性,我们比较我们的结果对使用纯Fisher-Hartwig符号的数值。

英文摘要:

We study the asymptotic eigenvalue distribution of Toeplitz matrices generated by a singular symbol. It has been conjectured by Widom that, for a generic symbol, the eigenvalues converge to the image of the symbol. In this paper we ask how the eigenvalues converge to the image. For a given Toeplitz matrix $T_n(a)$ of size $n$, we take the standard approach of looking at $\det(ζ-T_n(a))$, of which the asymptotic information is given by the Fisher-Hartwig theorem. For a symbol with single jump, we obtain the distribution of eigenvalues as an expansion involving $1/n$ and $\log n/n$. To demonstrate the validity of our result we compare our result against the numerics using a pure Fisher-Hartwig symbol.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑