Asymptotics of the Gauss hypergeometric function with large parameters, II

Richard B. Paris

Asymptotics of the Gauss hypergeometric function with large parameters, II

Richard B. Paris

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Abstract

We obtain asymptotic expansions by application of the method of steepest descents for the Gauss hypergeometric function F(a+ε1λ,b+ε2λ;c+λ;z) as |λ| → ∞ when 0<ε1 <1 and ε1 >1 where, without loss of generality, it is supposed that ε1 6ε2 . The resulting expansions are of Poincar´e type and break down in the neighbourhood of certain critical points in the z-plane. Numerical results illustrating the accuracy of the different expansions are given.

Original language	English
Pages (from-to)	1-15
Number of pages	15
Journal	Journal of Classical Analysis
Volume	3
Issue number	1
Publication status	Published - 2013

Keywords

Hypergeometric functions
Asymptotic expansion
Large parameters

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abstract = "We obtain asymptotic expansions by application of the method of steepest descents for the Gauss hypergeometric function F(a+ε1λ,b+ε2λ;c+λ;z) as |λ| → ∞ when 0<ε1 <1 and ε1 >1 where, without loss of generality, it is supposed that ε1 6ε2 . The resulting expansions are of Poincar´e type and break down in the neighbourhood of certain critical points in the z-plane. Numerical results illustrating the accuracy of the different expansions are given.",

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AB - We obtain asymptotic expansions by application of the method of steepest descents for the Gauss hypergeometric function F(a+ε1λ,b+ε2λ;c+λ;z) as |λ| → ∞ when 0<ε1 <1 and ε1 >1 where, without loss of generality, it is supposed that ε1 6ε2 . The resulting expansions are of Poincar´e type and break down in the neighbourhood of certain critical points in the z-plane. Numerical results illustrating the accuracy of the different expansions are given.

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JO - Journal of Classical Analysis

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Asymptotics of the Gauss hypergeometric function with large parameters, II

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