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Publication:2734447
zbMath0968.42501MaRDI QIDQ2734447
Publication date: 14 August 2001
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Extreme problems related to the approximation of the Lebesgue constant of a Fourier operator by a logarithmic function ⋮ Asymptotically best possible Lebesgue-type inequalities for the fourier sums on sets of generalized poisson integrals ⋮ On the constants in the inverse theorems for the norms of derivatives ⋮ Two-sided estimates for some functionals in terms of the best approximations ⋮ Uniform approximations by Fourier sums on the sets of convolutions of periodic functions of high smoothness ⋮ On the constants in abstract inverse theorems of approximation theory ⋮ On the constant in the estimate of deviation of Fejér averages in terms of best approximations ⋮ About the optimal replacement of the Lebesque constant Fourier operator by a logarithmic function ⋮ On optimal approximations of the norm of the Fourier operator by a family of logarithmic functions
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