14 results on '"Fourier series"'
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2. Approximation properties of fourier series of Sobolev orthogonal polynomials with Jacobi weight and discrete masses.
3. Direct and inverse theorems on the approximation of functions by Fourier-Laplace sums in the spaces S(σ).
4. Quality of approximation by fourier means in terms of general moduli of smoothness.
5. Approximation properties of Poisson integrals for the classes C H.
6. Best polynomial approximations and the widths of function classes in L.
7. Limit ultraspherical series and their approximation properties.
8. Best polynomial approximations in L of classes of 2 π-periodic functions and exact values of their widths.
9. Approximation of classes of convolutions by linear operators of special form.
10. On the order of approximation by Riesz means in multiplicative systems in the classes E[ ɛ].
11. Best approximations of periodic functions of several variables from the classes B.
12. Approximation of functions on the real axis by Féjer-type operators in the generalized Hölder metric.
13. On the boundedness below of trigonometric polynomials of best approximation.
14. Estimate of the approximation of periodic functions by Fourier series.
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