Abstract
In this work, we show some properties of Sheffer polynomials arising from quasi-monomiality. We survey characterization problems dealing with d-orthogonal polynomial sets of Sheffer type. We revisit some families in the literature and we state an explicit formula giving the exact number of Sheffer type d-orthogonal sets. We investigate, in detail, the (d + 1)-fold symmetric case as well as the particular cases d = 1, 2, 3.
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Acknowledgements
We are much indebted to the organisers, Wolfram Koepf and Mama Foupouagnigni, of the AIMS-Volkswagen Stiftung Workshop on Introduction to Orthogonal Polynomials and Applications, Douala, Cameroon, October 5–12, 2018 for the invitation, the interesting program and the kind hospitality.
The first author would like to extend his appreciation to the Deanship of Scientific Research at King Khalid University for funding his work through research groups program under grant (2019).
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Chaggara, H., Mbarki, R., Boussorra, S. (2020). Some Characterization Problems Related to Sheffer Polynomial Sets. In: Foupouagnigni, M., Koepf, W. (eds) Orthogonal Polynomials. AIMSVSW 2018. Tutorials, Schools, and Workshops in the Mathematical Sciences . Birkhäuser, Cham. https://doi.org/10.1007/978-3-030-36744-2_12
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DOI: https://doi.org/10.1007/978-3-030-36744-2_12
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