Mean-square approximation by an angle in $L_2$ and the values of quasiwidths for some classes of functions
UDC 517.5 In the metric $L_{2},$ we obtain exact inequalities that associate the best approximations by trigonometrical ``angles'' for functions $f(x,y),$ which are differentiable and $2\pi$-periodic in each variable, with the integrals containing modules of continuity of higher or...
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| Date: | 2020 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | Russian |
| Published: |
Institute of Mathematics, NAS of Ukraine
2020
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| Online Access: | https://umj.imath.kiev.ua/index.php/umj/article/view/1064 |
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| Journal Title: | Ukrains’kyi Matematychnyi Zhurnal |
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