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The CMV bispectrality of the Jacobi polynomials on the unit circle
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We show that the Jacobi polynomials that are orthogonal on the unit circle (the Jacobi OPUC) are CMV bispectral. This means that the corresponding Laurent polynomials in the CMV basis satisfy two dual ordinary eigenvalue problems: a recurrence relation and a differential equation of Dunkl type. This is presumably the first nontrivial explicit example of CMV bispectral OPUC. We introduce the circle Jacobi algebra which plays the role of hidden symmetry algebra for the Jacobi OPUC. All fundamental properties of the Jacobi OPUC can be derived from representations of this algebra.
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Cited by 1 Pith paper
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Bispectrality of the sieved Jacobi polynomials
The sieved Jacobi polynomials are shown to be eigenfunctions of new Dunkl-type differential operators, so they are bispectral.
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