Dual -1 Hahn polynomials: "classical" polynomials beyond the Leonard duality

Satoshi Tsujimoto, Luc Vinet, Alexei Zhedanov

We introduce the -1 dual Hahn polynomials through an appropriate $q\to -1$ limit of the dual q-Hahn polynomials. These polynomials are orthogonal on a finite set of discrete point…