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arXiv 1902.09540math.CA
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$r$ -星上的Laguerre-Angelesco多重正交多项式

Laguerre-Angelesco multiple orthogonal polynomials on an $r$-star

Marjolein Leurs, Walter Van Assche

摘要:

研究了$r$ -星上的I型和II型多重正交多项式,权函数为$|x|^βe^{-x^r}$,权函数为$β>-1$ .对于$1\leq j \leq r$,半无限间隔$[0,ω^{j-1}\infty)$和$ω=e^{2πi/r}$支持每个度量$μ_j$。对于第Ⅰ型和第Ⅱ型多项式,我们给出了显式表达式,递推关系中的系数,微分方程,并得到了多项式在对角线上的渐近零分布。同时,我们给出了$r$ -星上Laguerre-Angelesco多项式与Jacobi-Angelesco多项式之间的联系.

英文摘要:

We investigate the type I and type II multiple orthogonal polynomials on an $r$-star with weight function $|x|^βe^{-x^r}$, with $β>-1$. Each measure $μ_j$, for $1\leq j \leq r$, is supported on the semi-infinite interval $[0,ω^{j-1}\infty)$ with $ω=e^{2πi/r}$. For both the type I and the type II polynomials we give explicit expressions, the coefficients in the recurrence relation, the differential equation and we obtain the asymptotic zero distribution of the polynomials on the diagonal. Also, we give the connection between the Laguerre-Angelesco polynomials and the Jacobi-Angelesco polynomials on an $r$-star.

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