Exact values of the best (α, β) -approximations of classes of convolutions with kernels that do not increase the number of sign changes
We obtain the exact values of the best $(\alpha , \beta )$-approximations of the classes $K \ast F$ of periodic functions $K \ast f$ such that $f$ belongs to a given rearrangement-invariant set $F$ and $K$ is $2\pi$ -periodic kernel that do not increase the number of sign changes by the subspaces...
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| Date: | 2017 |
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| Main Authors: | , |
| Format: | Article |
| Language: | Russian |
| Published: |
Institute of Mathematics, NAS of Ukraine
2017
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| Online Access: | https://umj.imath.kiev.ua/index.php/umj/article/view/1759 |
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| Journal Title: | Ukrains’kyi Matematychnyi Zhurnal |
| Download file: |  |