Formula:KLS:14.08:35

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Q n ( 1 2 ( a q - x + a - 1 q x ) ; a , b ; q - 1 ) = ( - a b - 1 ) x q - 1 2 x ( x + 1 ) ( q b a - 1 ; q ) x ( a - 1 b - 1 ; q ) x p x ( q n ; b a - 1 , ( q a b ) - 1 ; q ) Al-Salam-Chihara-polynomial-Q 𝑛 1 2 𝑎 superscript 𝑞 𝑥 superscript 𝑎 1 superscript 𝑞 𝑥 𝑎 𝑏 superscript 𝑞 1 superscript 𝑎 superscript 𝑏 1 𝑥 superscript 𝑞 1 2 𝑥 𝑥 1 q-Pochhammer-symbol 𝑞 𝑏 superscript 𝑎 1 𝑞 𝑥 q-Pochhammer-symbol superscript 𝑎 1 superscript 𝑏 1 𝑞 𝑥 little-q-Jacobi-polynomial-p 𝑥 superscript 𝑞 𝑛 𝑏 superscript 𝑎 1 superscript 𝑞 𝑎 𝑏 1 𝑞 {\displaystyle{\displaystyle{\displaystyle Q_{n}\!\left(\frac{1}{2}(aq^{-x}+a^% {-1}q^{x});a,b\,;\,q^{-1}\right)=(-ab^{-1})^{x}q^{-\frac{1}{2}x(x+1)}\frac{% \left(qba^{-1};q\right)_{x}}{\left(a^{-1}b^{-1};q\right)_{x}}p_{x}\!\left(q^{n% };ba^{-1},(qab)^{-1};q\right)}}}

Proof

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Symbols List

Q n subscript 𝑄 𝑛 {\displaystyle{\displaystyle{\displaystyle Q_{n}}}}  : q 𝑞 {\displaystyle{\displaystyle{\displaystyle q}}} -inverse Al-Salam-Chihara polynomial : http://dlmf.nist.gov/23.1
( a ; q ) n subscript 𝑎 𝑞 𝑛 {\displaystyle{\displaystyle{\displaystyle(a;q)_{n}}}}  : q 𝑞 {\displaystyle{\displaystyle{\displaystyle q}}} -Pochhammer symbol : http://dlmf.nist.gov/5.18#i http://dlmf.nist.gov/17.2#SS1.p1
p n subscript 𝑝 𝑛 {\displaystyle{\displaystyle{\displaystyle p_{n}}}}  : little q 𝑞 {\displaystyle{\displaystyle{\displaystyle q}}} -Jacobi polynomial : http://drmf.wmflabs.org/wiki/Definition:littleqJacobi

Bibliography

Equation in Section 14.8 of KLS.

URL links

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