Pointwise estimation of sign-preserving polynomial approximation on arcs in the complex plane
UDC 517.53 V. Andrievskii proved in 2014 that if a real-valued function $f\in{\rm Lip}\,\alpha,$ $0<\alpha <1,$ defined on a given smooth Jordan curve satisfying the Dini condition changes its sign finitely many times, then it can be approximated by a harmonic polynomial that c...
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| Date: | 2022 |
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| Main Authors: | , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Institute of Mathematics, NAS of Ukraine
2022
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| Online Access: | https://umj.imath.kiev.ua/index.php/umj/article/view/7057 |
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| Journal Title: | Ukrains’kyi Matematychnyi Zhurnal |
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