A note on the approximation by a sum of two algebras
| Autor: | Asgarova, Aida, Ismailov, Vugar |
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| Rok vydání: | 2024 |
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| Druh dokumentu: | Working Paper |
| Popis: | We consider the problem of approximation of a continuous function $f$ defined on a compact metric space $X$ by elements from a sum of two algebras. We prove a de la Vall\'{e}e Poussin type theorem, which estimates the approximation error $E(f)$ from below. We also obtain a duality formula for the precise computation of $E(f)$. Comment: 10 pages, typos corrected, references added; this paper includes material from arXiv:2204.07448 |
| Databáze: | arXiv |
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