$S{U}_q(3)$ corepresentations and bivariate $q$-Krawtchouk polynomials

Abstract

The matrix elements of unitary $S{U}_q(3)$ corepresentations, which are analogues of the symmetric powers of the natural repesentation, are shown to be the bivariate $q$-Krawtchouk orthogonal polynomials, thus providing an algebraic interpretation of these polynomials in terms of quantum groups.

14 pages