In recent decades, advances have extended the classical families—such as Hermite, Laguerre and Jacobi polynomials—to so‐called exceptional orthogonal polynomials. These variants allow for ...

In parallel, research into Δɷ-Laguerre based Appell polynomials has opened up new pathways by linking these polynomials to well-known special functions, thereby broadening their applicability ...

James V. Uspensky, On the Development of Arbitrary Functions in Series of Hermite's and Laguerre's Polynomials, Annals of Mathematics, Vol. 28, No. 1/4 (1926 - 1927), pp. 593-619 ...