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math-ph2023★ 1 cited
-Griffiths polynomials: Bispectrality and biorthogonality
N. Crampe, L. Frappat, J. Gaboriaud +3
We introduce a generalization of bivariate Griffiths polynomials depending on an additional parameter . These -Griffiths polynomials are bivariate, bispectral and biorthogona…
math.RT2023
Matrix elements of in representations as bispectral multivariate functions
Nicolas Crampe, Julien Gaboriaud, Loïc Poulain d'Andecy +1
We compute the matrix elements of in any finite-dimensional irreducible representation of . They are expressed in terms of a double sum of products of Krawtchouk and…