A second addition formula for continuous q-ultraspherical polynomials
| dc.creator | Koornwinder, Tom H. | |
| dc.date | 2003-03-17 | |
| dc.date | 2003-06-26 | |
| dc.date.accessioned | 2026-07-07T04:56:08Z | |
| dc.date.available | 2026-07-07T04:56:08Z | |
| dc.description | This paper provides the details of Remark 5.4 in the author's paper "Askey-Wilson polynomials as zonal spherical functions on the SU(2) quantum group", SIAM J. Math. Anal. 24 (1993), 795-813. In formula (5.9) of the 1993 paper a two-parameter class of Askey-Wilson polynomials was expanded as a finite Fourier series with a product of two 3phi2's as Fourier coefficients. The proof given there used the quantum group interpretation. Here this identity will be generalized to a 3-parameter class of Askey-Wilson polynomials being expanded in terms of continuous q-ultraspherical polynomials with a product of two 2phi2's as coefficients, and an analytic proof will be given for it. Then Gegenbauer's addition formula for ultraspherical polynomials and Rahman's addition formula for q-Bessel functions will be obtained as limit cases. This q-analogue of Gegenbauer's addition formula is quite different from the addition formula for continuous q-ultraspherical polynomials obtained by Rahman and Verma in 1986. Furthermore, the functions occurring as factors in the expansion coefficents will be interpreted as a special case of a system of biorthogonal rational functions with respect to the Askey-Roy q-beta measure. A degenerate case of this biorthogonality are Pastro's biorthogonal polynomials associated with the Stieltjes-Wigert polynomials. | |
| dc.description | 17 pages; remarks added; to appear in "Theory and Applications of Special Functions. A Volume Dedicated to Mizan Rahman", M. E. H. Ismail and E. Koelink (eds.), Developments in Mathematics, Kluwer | |
| dc.identifier | https://arxiv.org/abs/math/0303211 | |
| dc.identifier | http://arxiv.org/abs/math/0303211 | |
| dc.identifier | Theory and Applications of Special Functions. A Volume Dedicated to Mizan Rahman, M.E.H. Ismail and E. Koelink (eds.), Developments in Mathematics, Vol. 13, Springer, 2005, pp. 339-360 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/66814 | |
| dc.subject | Classical Analysis and ODEs | |
| dc.subject | 33D45 (primary); 33D80 (secondary) | |
| dc.title | A second addition formula for continuous q-ultraspherical polynomials | |
| dc.type | text |