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Banach algebras for Jacobi series and positivity of a kernel. (English) Zbl 0236.33013


MSC:

33C45 Orthogonal polynomials and functions of hypergeometric type (Jacobi, Laguerre, Hermite, Askey scheme, etc.)
42C05 Orthogonal functions and polynomials, general theory of nontrigonometric harmonic analysis
42A85 Convolution, factorization for one variable harmonic analysis
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