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This article is cited in 3 scientific papers (total in 3 papers)
Upper bounds for the best one-sided approximation by splines of the classes $W^rL_1$
V. G. Doronina, A. A. Ligunb a Dnepropetrovsk State University
b Dneprodzerzhinsk Industrial Institute
Abstract:
In the present note we will investigate the problem of the one-sided approximation of functions by $n$-dimensional subspaces. In particular, we will find the exact value of the best one-sided approximation of the class $W^rL_1$ ($r=1,2,\dots$) of all periodic functions $f(x)$ of period $2\pi$ for which $f^{(r-1)}(x)$ ($f^{(0)}(x)=f(x)$) is absolutely continuous and $\|f^{(r)}\|_{L_1}\le1$ by periodic spline functions $S_{2n,\mu}$ ($\mu=0,1,\dots$, $n=1,2,\dots$) of period $2\pi$, order $\mu$, and deficiency 1.
Received: 25.12.1974
Citation:
V. G. Doronin, A. A. Ligun, “Upper bounds for the best one-sided approximation by splines of the classes $W^rL_1$”, Mat. Zametki, 19:1 (1976), 11–17; Math. Notes, 19:1 (1976), 7–10
Linking options:
https://www.mathnet.ru/eng/mzm7718 https://www.mathnet.ru/eng/mzm/v19/i1/p11
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