On the number of local best approximations by exponential sums

DOI10.1016/0021-9045(82)90020-XzbMath0487.41032MaRDI QIDQ1165414

Rüdiger Verfürth

Publication date: 1982

Published in: Journal of Approximation Theory (Search for Journal in Brave)

zbMATH Keywords

exponential sumsnumber of local best approximationsuniform approximation of continuous functions

Mathematics Subject Classification ID

Best approximation, Chebyshev systems (41A50) Trigonometric and exponential sums (general theory) (11L03) Approximation by other special function classes (41A30)

Cites Work

• Unnamed Item
• On the numer of best approximations in certain non-linear families of functions
• On rational \(L_2\)-Approximation
• Chebyshev approximation by \(\gamma\)-polynomials. III. On the number of best approximations
• Approximation mit Exponentialsummen
• On the compactness of exponential sums
• Chebyshev approximation by \(\gamma\)-polynomials. I
• Chebyshev-approximation by \(\gamma\)-polynomials. II

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