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Formula:3915

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Digital Library of Mathematical Functions ID 10.19#Ex1

J ν ⁡ ( ν ⁢ sech ⁡ α ) ∼ e ν ⁢ ( tanh ⁡ α - α ) ( 2 ⁢ π ⁢ ν ⁢ tanh ⁡ α ) 1 2 ⁢ ∑ k = 0 ∞ U k ⁢ ( coth ⁡ α ) ν k , asymptotic-expansion Bessel-J 𝜈 𝜈 𝛼 superscript 𝑒 𝜈 𝛼 𝛼 superscript 2 𝜋 𝜈 𝛼 1 2 superscript subscript 𝑘 0 subscript 𝑈 𝑘 hyperbolic-cotangent 𝛼 superscript 𝜈 𝑘 {\displaystyle{\displaystyle J_{\nu}\left(\nu\operatorname{sech}\alpha\right)% \sim\frac{e^{\nu(\tanh\alpha-\alpha)}}{(2\pi\nu\tanh\alpha)^{\frac{1}{2}}}\sum% _{k=0}^{\infty}\frac{U_{k}(\coth\alpha)}{\nu^{k}},}}


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