On the Lebesgue Inequality on Classes of $ \bar{\psi} $ -Differentiable Functions

@article{Zaderei2013OnTL,
  title={On the Lebesgue Inequality on Classes of \$ \bar\{\psi\} \$ -Differentiable Functions},
  author={N. M. Zaderei and P. Zaderei},
  journal={Ukrainian Mathematical Journal},
  year={2013},
  volume={65},
  pages={938-944}
}
We consider the deviations of Fourier sums in the spaces $ {C^{\bar{\psi}}} $. The estimates of these deviations are expressed via the best approximations of the $ \bar{\psi} $ -derivatives of functions in the Stepanets sense. The sequences $ \bar{\psi} $ = (ψ1, ψ2) are quasiconvex. 
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