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Christoffel-Darboux kernels in several real variables

Published 16 Sep 2022 in math.CA | (2209.07839v1)

Abstract: The Christoffel-Darboux kernels for orthogonal polynomials in several real variables are investigated within the context of the three term recurrence relation reformulated for this purpose. Examples of orthogonal polynomials on the unit circle and on the Bernoulli lemniscate are discussed.

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