Ladder operators and a second--order difference equation for general discrete Sobolev orthogonal polynomials

Galina Filipuk, Juan F. Mañas-Mañas, Juan J. Moreno-Balcázar

We consider a general discrete Sobolev inner product involving the Hahn difference operator, so this includes the well--known difference operators ${\mathcal{D}}_q$ and $\Delta$ and, as…