No Jackson-type estimates for piecewise $q$-monotone, $q\ge3$, trigonometric approximation
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Publication:6338315
DOI10.1007/S11253-022-02099-XzbMath1526.41002arXiv2004.03724MaRDI QIDQ6338315
I. A. Shevchuk, Dany Leviatan, O. V. Motorna
Publication date: 7 April 2020
Inequalities in approximation (Bernstein, Jackson, Nikol'ski?-type inequalities) (41A17) Approximation with constraints (41A29)
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