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Product formulas for basic hypergeometric series by evaluations of Askey-Wilson polynomials
Howard S Cohl1, Michael J Schlosser2
1Applied and Computational Mathematics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8910 USA.
None:
Ismail and Wilson derived a generating function for Askey-Wilson polynomials which is given by a product of q-Gauss (Heine) nonterminating basic hypergeometric functions. We provide a generalization of that generating function which contains an extra parameter. A special case gives a closed form summation formula for a quadruple basic hypergeometric sum. We further present new terminating balanced summations that give rise to q-quadratic special values for Askey-Wilson polynomials. We also similarly present new terminating 2-balanced and 3-balanced summations. Using the Ismail-Wilson generating function combined with explicit summations for terminating balanced basic hypergeometric series, we compute new basic hypergeometric product transformations for nonterminating basic hypergeometric series and provide corresponding integral representations. Further new identities are obtained by applying Cayley-Orr type expansion formulas.
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