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arxiv: 1506.01116 · v1 · pith:EQNPZZHRnew · submitted 2015-06-03 · 🧮 math.CA

A remark on the trigonometric system

classification 🧮 math.CA
keywords trigonometricordersystemveryarrangedcasesclassescoefficients
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We present a new property of the trigonometric system arranged in a natural order. It is shown that the sequence of subspaces of trigonometric polynomials is optimal in the sense of order of convergence on convolution classes K*Up in Lq for any 1<p,q<\infty just in the cases of "very slow" or "very fast" rate of decay of Fourier coefficients of K.

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