Gauss-Laguerre and related quadratures - Explicit formula of the error term - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2023

Gauss-Laguerre and related quadratures - Explicit formula of the error term

Olivier Bouillot
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Résumé

We investigate a new quadrature, namely the Gauss-Laguerre-like qua-drature, close to the Gauss-Laguerre quadrature, those whose weight function is modified from $z \longmapsto e^{-z}$ to $z \longmapsto (1 + e^{-z})^{-1}$. Firstly, we prove an explicit error formula for the Gauss-Laguerre and the Gauss-Laguerre-like quadratures, which apply to a subclass of holomorphic functions with isolated singularities outside of $]0 ; + \infty[$. Then, we explore the asymptotic of the respective error terms on two simple examples but sufficiently general to be meaningful for the reader. In order to control explicitly their relative error and to compute the related integrals, we also give explicit upper bounds of the error in these two examples.
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Dates et versions

hal-04368074 , version 1 (31-12-2023)

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  • HAL Id : hal-04368074 , version 1

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Olivier Bouillot. Gauss-Laguerre and related quadratures - Explicit formula of the error term. 2023. ⟨hal-04368074⟩
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