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arXiv 1710.09481math.PRmath-phmath.MP
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Pólya系综和多项式系综的加法矩阵卷积

Additive Matrix Convolutions of Pólya Ensembles and Polynomial Ensembles

Mario Kieburg

摘要:

最近,加法和乘法矩阵卷积的多项式系综的子类被确定为Pólya系综(或导数型多项式系综)。这些集合在各自的卷积下是封闭的,因此,当手工添加单位元素时,可以构建一个半群。它们甚至在多项式系综上具有半群作用。此外,在一些作品中,当与特定的Pólya系综进行加法或乘法矩阵卷积时,得到了给定多项式系综的双正交函数和核的变换。对于复方阵上的乘法矩阵卷积,甚至可以对一般的Pólya系综进行变换。本文将这些结果推广到埃尔米特矩阵、埃尔米特反对称矩阵、埃尔米特反自对偶矩阵和矩形复矩阵上的加法卷积。为了这个目的,我们推导出双正交函数和相应的核一般Pólya合奏这是没有做过。借助于这些结果,我们找到了与固定矩阵或随机矩阵的卷积的变换公式,这些矩阵是从一般多项式系综中得出的。作为一个例子,我们考虑Pólya合奏与相关的权重,这是一个Pólya频率函数的无限阶。但我们也明确评估高斯酉系综以及复杂的拉盖尔(又名Wishart,Ginibre或手征高斯酉)系综。所有结果都适用于有限维矩阵。此外,我们得到了一个递归关系之间的Toeplitz行列式出现作为我们的结果的副产品。

英文摘要:

Recently subclasses of polynomial ensembles for additive and multiplicative matrix convolutions were identified which were called Pólya ensembles (or polynomial ensembles of derivative type). Those ensembles are closed under the respective convolutions and, thus, build a semi-group when adding by hand a unit element. They even have a semi-group action on the polynomial ensembles. Moreover in several works transformations of the bi-orthogonal functions and kernels of a given polynomial ensemble were derived when performing an additive or multiplicative matrix convolution with particular Pólya ensembles. For the multiplicative matrix convolution on the complex square matrices the transformations were even done for general Pólya ensembles. In the present work we generalize these results to the additive convolution on Hermitian matrices, on Hermitian anti-symmetric matrices, on Hermitian anti-self-dual matrices and on rectangular complex matrices. For this purpose we derive the bi-orthogonal functions and the corresponding kernel for a general Pólya ensemble which was not done before. With the help of these results we find transformation formulas for the convolution with a fixed matrix or a random matrix drawn from a general polynomial ensemble. As an example we consider Pólya ensembles with an associated weight which is a Pólya frequency function of infinite order. But we also explicitly evaluate the Gaussian unitary ensemble as well as the complex Laguerre (aka Wishart, Ginibre or chiral Gaussian unitary) ensemble. All results hold for finite matrix dimension. Furthermore we derive a recursive relation between Toeplitz determinants which appears as a by-product of our results.

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