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Sampling discretization of integral norms of the hyperbolic cross polynomials (2005.05967v1)
Published 12 May 2020 in math.NA, cs.NA, and math.FA
Abstract: The paper is devoted to discretization of integral norms of functions from a given finite dimensional subspace. We use recent general results on sampling discretization to derive a new Marcinkiewicz type discretization theorem for the multivariate trigonometric polynomials with frequencies from the hyperbolic crosses. It is shown that recently developed techniques allow us to improve the known results in this direction.