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On the $q$-Charlier Multiple Orthogonal Polynomials

Research paper by Jorge Arvesú, Andys M. Ramírez-Aberasturis

Indexed on: 28 Mar '15Published on: 28 Mar '15Published in: Mathematics - Classical Analysis and ODEs



Abstract

We introduce a new family of special functions, namely $q$-Charlier multiple orthogonal polynomials. These polynomials are orthogonal with respect to $q$-analogues of Poisson distributions. We focus our attention on their structural properties. Raising and lowering operators as well as Rodrigues-type formulas are obtained. An explicit representation in terms of a $q$-analogue of the second of Appell's hypergeometric functions is given. A high-order linear $q$-difference equation with polynomial coefficients is deduced. Moreover, we show how to obtain the nearest neighbor recurrence relation from some difference operators involved in the Rodrigues-type formula.