Mixed type multiple orthogonal polynomials associated with the modified Bessel functions and products of two coupled random matrices
Mixed type multiple orthogonal polynomials associated with the modified Bessel functions and products of two coupled random matrices
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与修正贝塞尔函数和两个耦合随机矩阵的乘积相关的混合型多重正交多项式
DOI:
10.1016/j.jat.2016.09.002
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发表时间:
2016-05
影响因子:
0.9
通讯作者:
Zhang Lun
中科院分区:
文献类型:
--
作者:
Zhang Lun
We consider mixed type multiple orthogonal polynomials associated with a system of weight functions consisting of two vectors. One vector is defined in terms of scaled modified Bessel function of the first kind I μ and I μ+ 1, the other vector is defined in terms of scaled modified Bessel function of the second kind K ν and K ν+ 1. We show that the corresponding mixed type multiple orthogonal polynomials exist. For the special case that each multi-index is on or close to the diagonal, basic properties of the polynomials and their linear forms are investigated, which include explicit formulas, integral representations, differential properties, limiting forms and recurrence relations. It comes out that, for specified parameters, the linear forms of these mixed type multiple orthogonal polynomials can be interpreted as biorthogonal functions encountering in recent studies of products of two coupled random matrices. This particularly implies a Riemann–Hilbert characterization of the correlation kernel, which provides an alternative way for further asymptotic analysis.
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影响因子:
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