q-Hahn polynomials

The polynomials are given in terms of basic hypergeometric functions by

${\displaystyle Q_{n}(q^{-x};a,b,N;q)={}_{3}\phi _{2}\left[{\begin{matrix}q^{-n},abq^{n+1},q^{-x}\\aq,q^{-N}\end{matrix}};q,q\right].}$

q-Hahn polynomials→ Quantum q-Krawtchouk polynomials：

${\displaystyle \lim _{a\to \infty }Q_{n}(q^{-x};a;p,N|q)=K_{n}^{qtm}(q^{-x};p,N;q)}$

q-Hahn polynomials→ Hahn polynomials

make the substitution${\displaystyle \alpha =q^{\alpha }}$,${\displaystyle \beta =q^{\beta }}$ into definition of q-Hahn polynomials, and find the limit q→1, we obtain

${\displaystyle {}_{3}F_{2}(-n,\alpha +\beta +n+1,-x,\alpha +1,-N,1)}$，which is exactly Hahn polynomials.

• Gasper, George; Rahman, Mizan (2004), Basic hypergeometric series, Encyclopedia of Mathematics and its Applications, vol. 96 (2nd ed.), Cambridge University Press, ISBN 978-0-521-83357-8, MR 2128719
• Koekoek, Roelof; Lesky, Peter A.; Swarttouw, René F. (2010), Hypergeometric orthogonal polynomials and their q-analogues, Springer Monographs in Mathematics, Berlin, New York: Springer-Verlag, doi:10.1007/978-3-642-05014-5, ISBN 978-3-642-05013-8, MR 2656096
• Koornwinder, Tom H.; Wong, Roderick S. C.; Koekoek, Roelof; Swarttouw, René F. (2010), "Chapter 18: Orthogonal Polynomials", in Olver, Frank W. J.; Lozier, Daniel M.; Boisvert, Ronald F.; Clark, Charles W. (eds.), NIST Handbook of Mathematical Functions, Cambridge University Press, ISBN 978-0-521-19225-5, MR 2723248.
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