Abstract
The eigenvalues of the classical association schemes are given by certain Askey-Wilson polynomials (or limiting cases). Kernel polynomials of the Askey-Wilson polynomials are also Askey-Wilson polynomials. We determine when both the Askey-Wilson polynomials and their kernels are the eigenvalues for known association schemes.
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Chihara, L.M. Askey-Wilson polynomials, kernel polynomials and association schemes. Graphs and Combinatorics 9, 213–223 (1993). https://doi.org/10.1007/BF02988310
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DOI: https://doi.org/10.1007/BF02988310