Formula:KLS:14.11:16

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formula in Big q-Laguerre

Formula:KLS:14.11:18 >>

${\displaystyle{\displaystyle{\displaystyle\mathcal{D}_{q}\left[w(x;a,b;q)P_{n}\!\left(x;a,b;q\right)\right]{}=\frac{(1-a)(1-b)}{ab(1-q)}w(x;aq^{-1},bq^{-1};q)P_{n+1}\!\left(x;aq^{-1},bq^{-1};q\right)}}}$

Substitution(s)

${\displaystyle{\displaystyle{\displaystyle w(x;a,b;q)=\frac{\left(a^{-1}x,b^{-1}x;q\right)_{\infty}}{\left(x;q\right)_{\infty}}}}}$

Proof

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Symbols List

${\displaystyle{\displaystyle{\displaystyle\mathcal{D}_{q}^{n}}}}$ : ${\displaystyle{\displaystyle{\displaystyle q}}}$-derivative : http://drmf.wmflabs.org/wiki/Definition:qderiv
${\displaystyle{\displaystyle{\displaystyle P_{n}}}}$ : big ${\displaystyle{\displaystyle{\displaystyle q}}}$-Laguerre polynomial : http://drmf.wmflabs.org/wiki/Definition:bigqLaguerre
${\displaystyle{\displaystyle{\displaystyle(a;q)_{n}}}}$ : ${\displaystyle{\displaystyle{\displaystyle q}}}$-Pochhammer symbol : http://dlmf.nist.gov/5.18#i http://dlmf.nist.gov/17.2#SS1.p1

Bibliography

Equation in Section 14.11 of KLS.

URL links

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formula in Big q-Laguerre

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