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The approximation of a Hölder class of two variables by Riesz spherical means
B. I. Golubov Moscow Institute of Physics and Technology
Abstract:
For periodic functions of the Hölder class $H_2^\alpha$ ($0<\alpha\le1$) defined in the two-dimensional space $E_2$, we find the asymptotic form as $R\to+\infty$ of the quantity
$$\sup_{f\in H_2^\alpha}\|S_r^\delta(x,f)-f(x)\|_{C(E_2)}\left(\delta>\frac12+\alpha\right),$$
where $S_R^\delta(x,f)$ is the Riesz spherical mean of order $\delta$ of the Fourier series of the function $f(x)$.
Received: 08.01.1973
Citation:
B. I. Golubov, “The approximation of a Hölder class of two variables by Riesz spherical means”, Mat. Zametki, 15:1 (1974), 33–43; Math. Notes, 15:1 (1974), 20–25
Linking options:
https://www.mathnet.ru/eng/mzm7316 https://www.mathnet.ru/eng/mzm/v15/i1/p33
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Abstract page: | 202 | Full-text PDF : | 94 | First page: | 1 |
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