Little q-Laguerre polynomials
# Little q-Laguerre polynomials

In mathematics, the little q-Laguerre polynomials $p_n(x;a|q)$ or Wall polynomials $W_n(x;$ b,q) are a family of basic hypergeometric orthogonal polynomials in the basic Askey scheme closely related to a continued fraction studied by Wall (1941). (The term "Wall polynomial" is also used for an unrelated Wall polynomial in the theory of classical groups.) Roelof Koekoek, Peter A. Lesky, and René F. Swarttouw (2010, 14) give a detailed list of their properties.

## Definition

The polynomials are given in terms of basic hypergeometric functions and the q-Pochhammer symbol by

    $\displaystyle p_{n}(x;a|q)=_{2}\phi _{1}(q^{-n},0;aq;q,qx)={\frac {1}{(a^{-1}q^{-n};q)_{n}}}_{2}\phi _{0}(q^{-n},x^{-1};;q,x/a)$
