Formula:KLS:14.19:15

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δ q P n ( α ) ( x | q ) = - q - n + 1 2 α + 3 4 ( e i θ - e - i θ ) P n - 1 ( α + 1 ) ( x | q ) subscript 𝛿 𝑞 continuous-q-Laguerre-polynomial-P 𝛼 𝑛 𝑥 𝑞 superscript 𝑞 𝑛 1 2 𝛼 3 4 imaginary-unit 𝜃 imaginary-unit 𝜃 continuous-q-Laguerre-polynomial-P 𝛼 1 𝑛 1 𝑥 𝑞 {\displaystyle{\displaystyle{\displaystyle\delta_{q}P^{(\alpha)}_{n}\!\left(x|% q\right)=-q^{-n+\frac{1}{2}\alpha+\frac{3}{4}}({\mathrm{e}^{\mathrm{i}\theta}}% -{\mathrm{e}^{-\mathrm{i}\theta}})P^{(\alpha+1)}_{n-1}\!\left(x|q\right)}}}

Substitution(s)

x = cos θ 𝑥 𝜃 {\displaystyle{\displaystyle{\displaystyle x=\cos\theta}}}


Proof

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Symbols List

P α ( n ) subscript superscript 𝑃 𝑛 𝛼 {\displaystyle{\displaystyle{\displaystyle P^{(n)}_{\alpha}}}}  : continuous q 𝑞 {\displaystyle{\displaystyle{\displaystyle q}}} -Laguerre polynomial : http://drmf.wmflabs.org/wiki/Definition:ctsqLaguerre
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
cos cos {\displaystyle{\displaystyle{\displaystyle\mathrm{cos}}}}  : cosine function : http://dlmf.nist.gov/4.14#E2

Bibliography

Equation in Section 14.19 of KLS.

URL links

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