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arXiv 1601.01650math.CA
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变离散Jacobi-Sobolev正交多项式的渐近性

Asymptotic behavior of varying discrete Jacobi--Sobolev orthogonal polynomials

Juan F. Mañas-Mañas, Francisco Marcellán, Juan J. Moreno-Balcázar

摘要:

在这方面的贡献,我们处理一个变化的离散Sobolev内积涉及的Jacobi重量。我们的目的是研究相应的正交多项式的渐近性质及其零点的行为。我们感兴趣的Mehler-Heine型公式,因为他们描述了从这些Sobolev正交多项式和Jacobi的渐近行为的观点之间的本质区别。此外,这种渐近行为提供了Sobolev多项式的零点在其他众所周知的特殊函数的零点方面的近似。我们推广了最近文献中的一些结果。

英文摘要:

In this contribution we deal with a varying discrete Sobolev inner product involving the Jacobi weight. Our aim is to study the asymptotic properties of the corresponding orthogonal polynomials and the behavior of their zeros. We are interested in Mehler-Heine type formulae because they describe the essential differences from the point of view of the asymptotic behavior between these Sobolev orthogonal polynomials and the Jacobi ones. Moreover, this asymptotic behavior provides an approximation of the zeros of the Sobolev polynomials in terms of the zeros of other well-known special functions. We generalize some results appeared in the literature very recently.

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