English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We calculate the least upper bounds for approximations in the metric of thespace $L_2$ by linear methods of summation of Fourier series on classes ofperiodic functions $L^\psi_{\bar\beta,1}$ defined by sequences of multipliers$\psi=\psi(k)$ and shifts of argument $\bar\beta=\beta_k$.

Approximation by linear methods of classes of $(\psi,\bar\beta)-$differentiable functions