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This article is cited in 12 scientific papers (total in 13 papers)
Order of the best spline approximations of some classes of functions
Yu. N. Subbotin, N. I. Chernykh V. A. Steklov Institute of Mathematics, Sverdlovsk Branch of the Academy of Sciences of USSR
Abstract:
The rate of decrease of the upper bounds of the best spline approximations $E_{m,n}(f)_p$ with undetermined $n$ nodes in the metric of the space $L_p(0,1)$ $(1\le p\le\infty)$ is studied in a class of functions $f(x)$ for which $\|f^{(m+1)}(x)\|_{L_q(0,1)}\le1$ $(1\le q\le\infty)$ or $\mathrm{var}\{f^{(m)}(x);0,1\}\le1$ ($m=1,2,\dots$, the preceding derivative is assumed absolutely continuous). An exact order of decrease of the mentioned bounds is found as $n\to\infty$, and asymptotic formulas are obtained for $p=\infty$ and $1\le q\le\infty$ in the case of an approximation by broken lines $(m=1)$. The simultaneous approximation of the function and its derivatives by spline functions and their appropriate derivatives is also studied.
Received: 05.05.1969
Citation:
Yu. N. Subbotin, N. I. Chernykh, “Order of the best spline approximations of some classes of functions”, Mat. Zametki, 7:1 (1970), 31–42; Math. Notes, 7:1 (1970), 20–26
Linking options:
https://www.mathnet.ru/eng/mzm6990 https://www.mathnet.ru/eng/mzm/v7/i1/p31
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Abstract page: | 398 | Full-text PDF : | 172 | First page: | 1 |
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