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A set of orthogonal polynomials that generalize the Racah coefficients or 6-j symbols. (English) Zbl 0437.33014

##### MSC:
 33C45 Orthogonal polynomials and functions of hypergeometric type (Jacobi, Laguerre, Hermite, Askey scheme, etc.) 33C05 Classical hypergeometric functions, $${}_2F_1$$
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