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arXiv 0902.0041math.CA
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微分-差分方程的多项式解

Polynomial solutions of differential-difference equations

Diego Dominici, Kathy Driver, Kerstin Jordaan

摘要:

研究了微分差分方程\[ P_{n+1}(x)=A_{n}(x)P_{n}^{\prime}(x)+B_{n}(x)P_{n}(x), n=0,1,... \]的多项式解的零点,其中$A_{n}$和$B_{n}$分别是次数至多为2和1的多项式.我们解决的问题时,零是真正的和简单的,是否相邻次数的多项式的零是交错的。我们的结果适用于一般类的多项式,但包括序列的经典正交多项式以及欧拉-Frobenius,贝尔和其他多项式。

英文摘要:

We investigate the zeros of polynomial solutions to the differential-difference equation \[ P_{n+1}(x)=A_{n}(x)P_{n}^{\prime}(x)+B_{n}(x)P_{n}(x), n=0,1,... \] where $A_{n}$ and $B_{n}$ are polynomials of degree at most 2 and 1 respectively. We address the question of when the zeros are real and simple and whether the zeros of polynomials of adjacent degree are interlacing. Our result holds for general classes of polynomials but includes sequences of classical orthogonal polynomials as well as Euler-Frobenius, Bell and other polynomials.

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。

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