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ЖУРНАЛЫ // Ural Mathematical Journal // Архив

Ural Math. J., 2018, том 4, выпуск 2, страницы 24–32 (Mi umj60)

Order equalities in different metrics for moduli of smoothness of various orders

Niyazi A. Il'yasov

Baku State University, Baku, AZ 1148, Azerbaijan

Аннотация: IIn this paper, we obtain order equalities for the $k$th order $L_{q}(T)$-moduli of smoothness $\omega_{k}(f;\delta)_{q}$ in terms of expressions that contain the $l$th order $L_{p}(T)$-moduli of smoothness $\omega_{ l }(f;\delta)_{p}$ on the class of periodic functions $f\in L_{p}(T)$ with monotonically decreasing Fourier coefficients, where $1<p<q<\infty,$ $k,l \in \mathbb{N},$ and $T=(-\pi,\pi].$

Ключевые слова: Inequalities of different metrics for moduli of smoothness, Order equality, Trigonometric Fourier series with monotone coefficients.

Язык публикации: английский

DOI: 10.15826/umj.2018.2.004



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