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Positivity proofs for linearization and connection coefficients of orthogonal polynomials satisfying an addition formula. (English) Zbl 0386.33009


MSC:

33C45 Orthogonal polynomials and functions of hypergeometric type (Jacobi, Laguerre, Hermite, Askey scheme, etc.)
42C10 Fourier series in special orthogonal functions (Legendre polynomials, Walsh functions, etc.)
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