Abstract
We obtain order estimates for the best M-term trigonometric approximations and approximations by Fourier sums for the classes B Ω p,θ of periodic functions of many variables in the uniform metric.
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Stasyuk, S.A. Approximation of the Classes B Ω p,θ of Periodic Functions of Many Variables in Uniform Metric. Ukrainian Mathematical Journal 54, 1885–1896 (2002). https://doi.org/10.1023/A:1024000709997
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DOI: https://doi.org/10.1023/A:1024000709997