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http://hdl.handle.net/11701/19391
Полная запись метаданных
Поле DC | Значение | Язык |
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dc.contributor.author | Vinogradov, Oleg L. | - |
dc.contributor.author | Ulitskaya, Anastasiya Yu. | - |
dc.date.accessioned | 2020-09-10T13:29:27Z | - |
dc.date.available | 2020-09-10T13:29:27Z | - |
dc.date.issued | 2020-09 | - |
dc.identifier.citation | Vinogradov O. L., Ulitskaya A. Yu. Optimal subspaces for mean square approximation of classes of differentiable functions on a segment. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 2020, vol. 7 (65), issue 3, pp. 404–417 | en_GB |
dc.identifier.other | https://doi.org/10.21638/spbu01.2020.304 | - |
dc.identifier.uri | http://hdl.handle.net/11701/19391 | - |
dc.description.abstract | In this paper, we specify a set of optimal subspaces for L2 approximation of three classes of functions in the Sobolev spaces W (r) 2 , defined on a segment and subject to certain boundary conditions. A subspace X of dimension not exceeding n is called optimal for a function class A if the best approximation of A by X equals the Kolmogorov n-width of A. These boundary conditions correspond to subspaces of periodically extended functions with symmetry properties. All of the approximating subspaces are generated by equidistant shifts of a single function. The conditions of optimality are given in terms of Fourier coefficients of a generating function. In particular, we indicate optimal spline spaces of all degrees d > r − 1 with equidistant knots of several different types. | en_GB |
dc.description.sponsorship | This work is supported by the Russian Science Foundation under grant no. 18-11-00055. | en_GB |
dc.language.iso | ru | en_GB |
dc.publisher | St Petersburg State University | en_GB |
dc.relation.ispartofseries | Vestnik of St Petersburg University. Mathematics. Mechanics. Astronomy;Volume 7 (65); Issue 3 | - |
dc.subject | spaces of shifts | en_GB |
dc.subject | splines | en_GB |
dc.subject | n-widths | en_GB |
dc.title | Optimal subspaces for mean square approximation of classes of differentiable functions on a segment | en_GB |
dc.type | Article | en_GB |
Располагается в коллекциях: | Issue 3 |
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404-417.pdf | 352,62 kB | Adobe PDF | Просмотреть/Открыть |
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