English

On universal sampling representation

Numerical Analysis 2022-01-04 v1 Numerical Analysis Functional Analysis

Abstract

For the multivariate trigonometric polynomials we study convolution with the corresponding the de la Vallee Poussin kernel from the point of view of discretization. In other words, we replace the normalized Lebesgue measure by a discrete measure in such a way, which preserves the convolution properties and provides sampling discretization of integral norms. We prove that in the two-variate case the Fibonacci point sets provide an ideal (in the sense of order) solution. We also show that the Korobov point sets provide a suboptimal (up to logarithmic factors) solution for an arbitrary number of variables.

Keywords

Cite

@article{arxiv.2201.00415,
  title  = {On universal sampling representation},
  author = {V. N. Temlyakov},
  journal= {arXiv preprint arXiv:2201.00415},
  year   = {2022}
}
R2 v1 2026-06-24T08:38:05.381Z