Extistence of best nonlinear Lp-approximations

DOI10.1080/01630568008816068zbMath0447.41022OpenAlexW2090660304MaRDI QIDQ3892706

Lutz Eichner

Publication date: 1980

Published in: Numerical Functional Analysis and Optimization (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1080/01630568008816068

zbMATH Keywords

linear differential equationsglobal existence theoremgeneralized exponential approximationLp-approximation problem

Mathematics Subject Classification ID

Best approximation, Chebyshev systems (41A50) Linear ordinary differential equations and systems (34A30) Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) (41A65) Approximation by arbitrary nonlinear expressions; widths and entropy (41A46)

Cites Work

• Unnamed Item
• Cayley's decomposition and Polya's W-property of ordinary linear differential equations
• Internal and external stability of linear systems
• On the compactness of exponential sums

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