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arXiv 1907.08950math.CAmath-phmath.MPnlin.SIquant-ph
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多指标 Laguerre 多项式与 Jacobi 多项式的离散正交关系

Discrete orthogonality relations for multi-indexed Laguerre and Jacobi polynomials

Choon-Lin Ho, Ryu Sasaki

AI总结:

本文证明多指标 Laguerre 与 Jacobi 多项式虽破坏三项递推,仍满足离散正交关系,并识别低次补多项式、确定 Christoffel 数。

摘要:

离散正交关系对所有满足三项递推关系的正交多项式都成立。我们证明,它们对多指标 Laguerre 多项式和 Jacobi 多项式同样成立;这些多项式是通过对上述经典正交多项式进行形变而得到的新型正交多项式。与三项递推关系相比,离散正交关系可被视为对正交多项式更具涵盖性的刻画。由于多指标正交多项式从正次数 ℓ_D≥1 开始,三项递推关系被破坏。我们识别出离散正交关系所必需的额外 ℓ_D 个“较低次数多项式”,并确定了相应的 Christoffel 数。主要结果是通过对支配多指标正交多项式的二阶微分算子,在次数 ℓ_D+N 的这些多项式零点附近进行爆破分析而得到的。离散正交关系还被证明对另一类称为 Krein-Adler 多项式的“新型”正交多项式成立,这类多项式基于 Hermite、Laguerre 和 Jacobi 多项式。

英文摘要:

The discrete orthogonality relations hold for all the orthogonal polynomials obeying three term recurrence relations. We show that they also hold for multi-indexed Laguerre and Jacobi polynomials, which are new orthogonal polynomials obtained by deforming these classical orthogonal polynomials. The discrete orthogonality relations could be considered as more encompassing characterisation of orthogonal polynomials than the three term recurrence relations. As the multi-indexed orthogonal polynomials start at a positive degree $\ell_{\mathcal D}\ge1$, the three term recurrence relations are broken. The extra $\ell_{\mathcal D}$ `lower degree polynomials', which are necessary for the discrete orthogonality relations, are identified. The corresponding Christoffel numbers are determined. The main results are obtained by the blow-up analysis of the second order differential operators governing the multi-indexed orthogonal polynomials around the zeros of these polynomials at a degree $\ell_{\mathcal D}+\mathcal{N}$. %changed The discrete orthogonality relations are shown to hold for another group of `new' orthogonal polynomials called Krein-Adler polynomials based on the Hermite, Laguerre and Jacobi 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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