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arXiv · 2110.06690

Asymptotic expansion of the Wright function for large variable and parameter

R B Paris
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Abstract

We consider the asymptotic expansion of the Wright function \[W_{\lambda,\mu}(z)=\sum_{n=0}^\infty\frac{z^n}{n! \Gamma(\lambda n+\mu)}\qquad (\lambda>-1)\] for large (positive and negative) variable and large parameter $\mu$. The analysis is based on use of the method of steepest descents applied to a suitable integral representation and, in part, complements the recent work of Ansari and Askari. Numerical results are presented to illustrate the accuracy of the different expansions obtained.

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R B Paris. 2021-10-13. Asymptotic expansion of the Wright function for large variable and parameter. https://arxiv.org/abs/2110.06690

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