Inverse theorems for the approximation of \((\psi{},\beta{})\)- differentiable functions (Q1812671)
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scientific article; zbMATH DE number 3889
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Inverse theorems for the approximation of \((\psi{},\beta{})\)- differentiable functions |
scientific article; zbMATH DE number 3889 |
Statements
Inverse theorems for the approximation of \((\psi{},\beta{})\)- differentiable functions (English)
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25 June 1992
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The authors prove relations between the sequences of the best approximations of \(f\in C_{2\pi}\) by trigonometric polynomials and characteristics of \((\psi,\beta)\)-derivatives of \(f\).
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\((\psi,\beta)\)-differentiable functions
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inverse theorems
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best approximations
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trigonometric polynomials
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