Formula:KLS:09.07:19

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lim λ λ - 1 2 n P n ( λ ) ( ( sin ϕ ) - 1 ( x λ - λ cos ϕ ) ; ϕ ) = H n ( x ) n ! subscript 𝜆 superscript 𝜆 1 2 𝑛 Meixner-Pollaczek-polynomial-P 𝜆 𝑛 superscript italic-ϕ 1 𝑥 𝜆 𝜆 italic-ϕ italic-ϕ Hermite-polynomial-H 𝑛 𝑥 𝑛 {\displaystyle{\displaystyle{\displaystyle\lim_{\lambda\rightarrow\infty}% \lambda^{-\frac{1}{2}n}P^{(\lambda)}_{n}\!\left((\sin\phi)^{-1}(x\sqrt{\lambda% }-\lambda\cos\phi);\phi\right)=\frac{H_{n}\left(x\right)}{n!}}}}

Proof

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Symbols List

P n ( α ) subscript superscript 𝑃 𝛼 𝑛 {\displaystyle{\displaystyle{\displaystyle P^{(\alpha)}_{n}}}}  : Meixner-Pollaczek polynomial : http://dlmf.nist.gov/18.19#P3.p1
sin sin {\displaystyle{\displaystyle{\displaystyle\mathrm{sin}}}}  : sine function : http://dlmf.nist.gov/4.14#E1
H n subscript 𝐻 𝑛 {\displaystyle{\displaystyle{\displaystyle H_{n}}}}  : Hermite polynomial H n subscript 𝐻 𝑛 {\displaystyle{\displaystyle{\displaystyle H_{n}}}}  : http://dlmf.nist.gov/18.3#T1.t1.r28

Bibliography

Equation in Section 9.7 of KLS.

URL links

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