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arXiv 1907.08552math.CAmath-phmath.MP
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两个参数都大时广义Hermite多项式的根

Roots of generalised Hermite polynomials when both parameters are large

Davide Masoero, Pieter Roffelsen

摘要:

研究了广义Hermite多项式$H_{m,n}$在$m$和$n$都很大时的根.我们证明,根,当适当地重新缩放,密集地填充有界的四边形区域,称为椭圆形区域,并组织自己的变形矩形晶格,作为数值观察克拉克森。我们用椭圆积分及其退化来描述椭圆区域和变形晶格。关键词:广义厄米多项式;根渐近; Painleve IV; Boutroux曲线; Tritronquee解决方案。

英文摘要:

We study the roots of the generalised Hermite polynomials $H_{m,n}$ when both $m$ and $n$ are large. We prove that the roots, when appropriately rescaled, densely fill a bounded quadrilateral region, called the elliptic region, and organise themselves on a deformed rectangular lattice, as was numerically observed by Clarkson. We describe the elliptic region and the deformed lattice in terms of elliptic integrals and their degenerations. Keywords: Generalised Hermite polynomials; roots asymptotics; Painleve IV; Boutroux Curves; Tritronquee solution.

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