Weak Chebyshev spaces and best L1-approximation
نویسندگان
چکیده
منابع مشابه
Interpolation by Weak Chebyshev Spaces
We present two characterizations of Lagrange interpolation sets for weak Chebyshev spaces. The rst of them is valid for an arbitrary weak Chebyshev space U and is based on an analysis of the structure of zero sets of functions in U extending Stockenberg's theorem. The second one holds for all weak Chebyshev spaces that possess a locally linearly independent basis. x1. Introduction Let U denote ...
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ژورنال
عنوان ژورنال: Journal of Approximation Theory
سال: 1983
ISSN: 0021-9045
DOI: 10.1016/0021-9045(83)90068-0