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Strong asymptotics of Jacobi-type kissing polynomials
Integral Transforms and Special Functions ( IF 1 ) Pub Date : 2021-07-02 , DOI: 10.1080/10652469.2021.1923707
A. B. Barhoumi 1
Affiliation  

We investigate asymptotic behaviour of polynomials pnω(z) satisfying varying non-Hermitian orthogonality relations 11xkpnω(x)h(x)eiωxdx=0,k{0,,n1},where h(x)=h(x)(1x)α(1+x)β, ω=λn, λ 0 and h(x) is holomorphic and non-vanishing in a certain neighbourhood in the plane. These polynomials are an extension of so-called kissing polynomials (α=β=0) introduced in Asheim et al. [A Gaussian quadrature rule for oscillatory integrals on a bounded interval. Preprint, 2012 Dec 6. arXiv:1212.1293] in connection with complex Gaussian quadrature rules with uniform good properties in ω. The analysis carried out here is an extension of what was done in Celsus and Silva [Supercritical regime for the kissing polynomials. J Approx Theory. 2020 Mar 18;225:Article ID: 105408]; Deaño [Large degree asymptotics of orthogonal polynomials with respect to an oscillatory weight on a bounded interval. J Approx Theory. 2014 Oct 1;186:33–63], and depends heavily on those works.



中文翻译:

Jacobi 型接吻多项式的强渐近性

我们研究多项式的渐近行为 nω(z) 满足不同的非厄米正交关系 -11Xnω(X)H(X)电子一世ωXdX=0,{0,,n-1},在哪里 H(X)=H(X)(1-X)α(1+X)β, ω=λn, λ 0H(X)在平面的某个邻域内是全纯的且不消失。这些多项式是所谓亲吻多项式的扩展(α=β=0) 在 Asheim 等人中介绍。[有界区间振荡积分的高斯求积法则。预印本,2012 年 12 月 6 日。arXiv:1212.1293] 与在ω 中具有均匀良好属性的复杂高斯求积规则有关。这里进行的分析是对 Celsus 和 Silva [亲吻多项式的超临界状态。J 近似理论。2020 年 3 月 18 日;225:文章 ID:105408];Deaño [关于有界区间上的振荡权重的正交多项式的大次渐近。J 近似理论。2014 Oct 1;186:33–63],并且在很大程度上依赖于这些作品。

更新日期:2021-07-04
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