A way to treat dual Hahn polynomials as Racah polynomials via the theory of Leonard pairs

Hau-Wen Huang

The dual Hahn polynomials $\{u_i(x){\}}_{i=0}^d$ are a family of discrete orthogonal polynomials involving two real parameters $r$ and $s$. Let $L,L^{\ast }$ denote the corresponding Leona…