Formula:KLS:14.07:10

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q - n ( 1 - q n ) y ( x ) = B ( x ) y ( x + 1 ) - [ B ( x ) + D ( x ) ] y ( x ) + D ( x ) y ( x - 1 ) superscript 𝑞 𝑛 1 superscript 𝑞 𝑛 𝑦 𝑥 𝐵 𝑥 𝑦 𝑥 1 delimited-[] 𝐵 𝑥 𝐷 𝑥 𝑦 𝑥 𝐷 𝑥 𝑦 𝑥 1 {\displaystyle{\displaystyle{\displaystyle q^{-n}(1-q^{n})y(x)=B(x)y(x+1)-% \left[B(x)+D(x)\right]y(x)+D(x)y(x-1)}}}

Substitution(s)

D ( x ) = - γ q x - N ( 1 - q x ) ( 1 - γ δ q x + N + 1 ) ( 1 - δ q x ) ( 1 - γ δ q 2 x ) ( 1 - γ δ q 2 x + 1 ) 𝐷 𝑥 𝛾 superscript 𝑞 𝑥 𝑁 1 superscript 𝑞 𝑥 1 𝛾 𝛿 superscript 𝑞 𝑥 𝑁 1 1 𝛿 superscript 𝑞 𝑥 1 𝛾 𝛿 superscript 𝑞 2 𝑥 1 𝛾 𝛿 superscript 𝑞 2 𝑥 1 {\displaystyle{\displaystyle{\displaystyle D(x)=-\frac{\gamma q^{x-N}(1-q^{x})% (1-\gamma\delta q^{x+N+1})(1-\delta q^{x})}{(1-\gamma\delta q^{2x})(1-\gamma% \delta q^{2x+1})}}}} &

B ( x ) = ( 1 - q x - N ) ( 1 - γ q x + 1 ) ( 1 - γ δ q x + 1 ) ( 1 - γ δ q 2 x + 1 ) ( 1 - γ δ q 2 x + 2 ) 𝐵 𝑥 1 superscript 𝑞 𝑥 𝑁 1 𝛾 superscript 𝑞 𝑥 1 1 𝛾 𝛿 superscript 𝑞 𝑥 1 1 𝛾 𝛿 superscript 𝑞 2 𝑥 1 1 𝛾 𝛿 superscript 𝑞 2 𝑥 2 {\displaystyle{\displaystyle{\displaystyle B(x)=\frac{(1-q^{x-N})(1-\gamma q^{% x+1})(1-\gamma\delta q^{x+1})}{(1-\gamma\delta q^{2x+1})(1-\gamma\delta q^{2x+% 2})}}}} &
y ( x ) = R n ( μ ( x ) ; γ , δ , N ) q 𝑦 𝑥 dual-q-Hahn-R 𝑛 𝜇 𝑥 𝛾 𝛿 𝑁 𝑞 {\displaystyle{\displaystyle{\displaystyle y(x)=R_{n}\!\left(\mu(x);\gamma,% \delta,N\right){q}}}} &
μ ( x ) = q - x + γ δ q x + 1 = q - x + q x + γ + δ + 1 = q - x + γ δ q x + 1 𝜇 𝑥 superscript 𝑞 𝑥 𝛾 𝛿 superscript 𝑞 𝑥 1 superscript 𝑞 𝑥 superscript 𝑞 𝑥 𝛾 𝛿 1 superscript 𝑞 𝑥 𝛾 𝛿 superscript 𝑞 𝑥 1 {\displaystyle{\displaystyle{\displaystyle\mu(x)=q^{-x}+\gamma\delta q^{x+1}=q% ^{-x}+q^{x+\gamma+\delta+1}=q^{-x}+\gamma\delta q^{x+1}}}} &
μ ( n ) = q - n + α β q n + 1 𝜇 𝑛 superscript 𝑞 𝑛 𝛼 𝛽 superscript 𝑞 𝑛 1 {\displaystyle{\displaystyle{\displaystyle\mu(n)=q^{-n}+\alpha\beta q^{n+1}}}} &
μ ( x ) := q - x + γ δ q x + 1 assign 𝜇 𝑥 superscript 𝑞 𝑥 𝛾 𝛿 superscript 𝑞 𝑥 1 {\displaystyle{\displaystyle{\displaystyle\mu(x):=q^{-x}+\gamma\delta q^{x+1}}}} &
μ ( x ) = q - x + γ δ q x + 1 = q - x + q x + γ + δ + 1 = q - x + γ δ q x + 1 𝜇 𝑥 superscript 𝑞 𝑥 𝛾 𝛿 superscript 𝑞 𝑥 1 superscript 𝑞 𝑥 superscript 𝑞 𝑥 𝛾 𝛿 1 superscript 𝑞 𝑥 𝛾 𝛿 superscript 𝑞 𝑥 1 {\displaystyle{\displaystyle{\displaystyle\mu(x)=q^{-x}+\gamma\delta q^{x+1}=q% ^{-x}+q^{x+\gamma+\delta+1}=q^{-x}+\gamma\delta q^{x+1}}}} &

μ ( n ) = q - n + α β q n + 1 𝜇 𝑛 superscript 𝑞 𝑛 𝛼 𝛽 superscript 𝑞 𝑛 1 {\displaystyle{\displaystyle{\displaystyle\mu(n)=q^{-n}+\alpha\beta q^{n+1}}}}


Proof

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Symbols List

& : logical and
R n subscript 𝑅 𝑛 {\displaystyle{\displaystyle{\displaystyle R_{n}}}}  : dual q 𝑞 {\displaystyle{\displaystyle{\displaystyle q}}} -Hahn polynomial : http://drmf.wmflabs.org/wiki/Definition:dualqHahn

Bibliography

Equation in Section 14.7 of KLS.

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