Formula:KLS:09.07:13: Difference between revisions

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( 1 - e i ϕ t ) - λ + i x ( 1 - e - i ϕ t ) - λ - i x = n = 0 P n ( λ ) ( x ; ϕ ) t n superscript 1 imaginary-unit italic-ϕ 𝑡 𝜆 imaginary-unit 𝑥 superscript 1 imaginary-unit italic-ϕ 𝑡 𝜆 imaginary-unit 𝑥 superscript subscript 𝑛 0 Meixner-Pollaczek-polynomial-P 𝜆 𝑛 𝑥 italic-ϕ superscript 𝑡 𝑛 {\displaystyle{\displaystyle{\displaystyle(1-{\mathrm{e}^{\mathrm{i}\phi}}t)^{% -\lambda+\mathrm{i}x}(1-{\mathrm{e}^{-\mathrm{i}\phi}}t)^{-\lambda-\mathrm{i}x% }=\sum_{n=0}^{\infty}P^{(\lambda)}_{n}\!\left(x;\phi\right)t^{n}}}}

Proof

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Symbols List

e e {\displaystyle{\displaystyle{\displaystyle\mathrm{e}}}}  : the base of the natural logarithm : http://dlmf.nist.gov/4.2.E11
i i {\displaystyle{\displaystyle{\displaystyle\mathrm{i}}}}  : imaginary unit : http://dlmf.nist.gov/1.9.i
Σ Σ {\displaystyle{\displaystyle{\displaystyle\Sigma}}}  : sum : http://drmf.wmflabs.org/wiki/Definition:sum
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

Bibliography

Equation in Section 9.7 of KLS.

URL links

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