Abstract:In [Castillo & Mbouna, Indag. Math. 31 (2020) [223][224][225][226][227][228][229][230][231][232][233][234], the concept of π N -coherent pairs of order (m, k) with index M is introduced. This definition, implicitly related with the standard derivative operator, automatically leaves out the so-called discrete orthogonal polynomials. The purpose of this note is twofold: first we use the (discrete) Hahn difference operator and rewrite the known results in this framework; second, as an application, we describe e… Show more
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