Formula:KLS:09.07:12

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ω ( x ; λ , ϕ ) P n ( λ ) ( x ; ϕ ) = ( - 1 ) n n ! ( δ δ x ) n [ ω ( x ; λ + 1 2 n , ϕ ) ] 𝜔 𝑥 𝜆 italic-ϕ Meixner-Pollaczek-polynomial-P 𝜆 𝑛 𝑥 italic-ϕ superscript 1 𝑛 𝑛 superscript 𝛿 𝛿 𝑥 𝑛 delimited-[] 𝜔 𝑥 𝜆 1 2 𝑛 italic-ϕ {\displaystyle{\displaystyle{\displaystyle\omega(x;\lambda,\phi)P^{(\lambda)}_% {n}\!\left(x;\phi\right)=\frac{(-1)^{n}}{n!}\left(\frac{\delta}{\delta x}% \right)^{n}\left[\omega(x;\lambda+\textstyle\frac{1}{2}n,\phi)\right]}}}

Substitution(s)

ω ( x ; λ , ϕ ) = Γ ( λ + i x ) Γ ( λ - i x ) e ( 2 ϕ - π ) x 𝜔 𝑥 𝜆 italic-ϕ Euler-Gamma 𝜆 imaginary-unit 𝑥 Euler-Gamma 𝜆 imaginary-unit 𝑥 2 italic-ϕ 𝑥 {\displaystyle{\displaystyle{\displaystyle\omega(x;\lambda,\phi)=\Gamma\left(% \lambda+\mathrm{i}x\right)\Gamma\left(\lambda-\mathrm{i}x\right){\mathrm{e}^{(% 2\phi-\pi)x}}}}}


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
Γ Γ {\displaystyle{\displaystyle{\displaystyle\Gamma}}}  : Euler's gamma function : http://dlmf.nist.gov/5.2#E1
i i {\displaystyle{\displaystyle{\displaystyle\mathrm{i}}}}  : imaginary unit : http://dlmf.nist.gov/1.9.i
e e {\displaystyle{\displaystyle{\displaystyle\mathrm{e}}}}  : the base of the natural logarithm : http://dlmf.nist.gov/4.2.E11
π 𝜋 {\displaystyle{\displaystyle{\displaystyle\pi}}}  : ratio of a circle's circumference to its diameter : http://dlmf.nist.gov/5.19.E4

Bibliography

Equation in Section 9.7 of KLS.

URL links

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