Linear approximation methods and the best approximations of the Poisson integrals of functions from the classes ${H_{{\omega_p}}}$ in the metrics of the spaces Lp

@article{Serdyuk2010LinearAM,
title={Linear approximation methods and the best approximations of the Poisson integrals of functions from the classes \$\{H_\{\{\omega_p\}\}\} \$ in the metrics of the spaces Lp},
author={A. Serdyuk and I. V. Sokolenko},
journal={Ukrainian Mathematical Journal},
year={2010},
volume={62},
pages={1139-1157}
}
• Published 2010
• Mathematics
• Ukrainian Mathematical Journal
We obtain upper estimates for the least upper bounds of approximations of the classes of Poisson integrals of functions from ${H_{{\omega_p}}}$ for 1 ≤ p < ∞ by a certain linear method Un* in the metric of the space Lp. It is shown that the obtained estimates are asymptotically exact for p = 1: In addition, we determine the asymptotic equalities for the best approximations of the classes of Poisson integrals of functions from ${H_{{\omega_1}}}$ in the metric of the space L1 and show that… Expand
2 Citations