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math.NA2023
Efficient recovery of non-periodic multivariate functions from few scattered samples
Felix Bartel, Kai Lüttgen, Nicolas Nagel +1
It has been observed by several authors that well-known periodization strategies like tent or Chebychev transforms lead to remarkable results for the recovery of multivariate funct…
math.NA2023
Nonlinear Approximation with Subsampled Rank-1 Lattices
Felix Bartel, Fabian Taubert
In this paper we approximate high-dimensional functions by sparse trigonometric polynomials based on function evaluations. Recently it was shown th…