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arXiv 1002.3967math.CAmath-phmath.MP
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微分方程的多项式解

Polynomial Solutions of Differential Equations

H. Azad, M. T. Mustafa

摘要:

证明了任何形式为$L(y)=\sum_{k=0}^{k=N} a_{k}(x) y^{(k)}$的微分算子,其中$a_k$是$\leq k$次的实多项式,对所有n,在至多n次的多项式空间中具有全部实特征值.特征值由$L(x^{n})$中$x^n$的系数给出。如果这些特征值是不同的,那么对于每个非负整数n,存在唯一的n次首一多项式,它是算子L-的特征函数。作为应用,我们恢复Bochner的分类二阶常微分方程的多项式系数和多项式的解决方案,以及家庭的非经典多项式。

英文摘要:

We show that any differential operator of the form $L(y)=\sum_{k=0}^{k=N} a_{k}(x) y^{(k)}$, where $a_k$ is a real polynomial of degree $\leq k$, has all real eigenvalues in the space of polynomials of degree at most n, for all n. The eigenvalues are given by the coefficient of $x^n$ in $L(x^{n})$. If these eigenvalues are distinct, then there is a unique monic polynomial of degree n which is an eigenfunction of the operator L- for every non-negative integer n. As an application we recover Bochner's classification of second order ODEs with polynomial coefficients and polynomial solutions, as well as a family of non-classical 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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