On a certain subset of \(L_ 1(\)0,1) and non-existence of best approximation in some spaces of operators
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Publication:1150837
DOI10.1016/0021-9045(80)90114-8zbMath0456.41029OpenAlexW1999427978MaRDI QIDQ1150837
Publication date: 1980
Published in: Journal of Approximation Theory (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1016/0021-9045(80)90114-8
Best approximation, Chebyshev systems (41A50) Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) (41A65) General theory of linear operators (47A99) Approximation by positive operators (41A36)
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