@Article{EAJAM-13-960, author = {Filipuk , GalinaMañas-Mañas , Juan F. and Moreno-Balcázar , Juan J.}, title = {Second-Order Difference Equation for Sobolev-Type Orthogonal Polynomials. Part II: Computational Tools}, journal = {East Asian Journal on Applied Mathematics}, year = {2023}, volume = {13}, number = {4}, pages = {960--979}, abstract = {

We consider polynomials orthogonal with respect to a nonstandard inner product. In fact, we deal with Sobolev-type orthogonal polynomials in the broad sense of the expression. This means that the inner product under consideration involves the Hahn difference operator, thus including the difference operators $\mathscr{D}_q$ and $∆$ and, as a limit case, the derivative operator. In a previous work, we studied properties of these polynomials from a theoretical point of view. There, we obtained a second-order differential/difference equation satisfied by these polynomials. The aim of this paper is to present an algorithm and a symbolic computer program that provides us with the coefficients of the second-order differential/difference equation in this general context. To illustrate both, the algorithm and the program, we will show three examples related to different operators.

}, issn = {2079-7370}, doi = {https://doi.org/10.4208/eajam.2022-235.190223}, url = {http://global-sci.org/intro/article_detail/eajam/22070.html} }