On Chebyshev subspaces in the space of multivariate differentiable functions
نویسندگان
چکیده
منابع مشابه
On Chebyshev Subspaces in the Space of Multivariate Differentiable Functions
In the present paper we give a characterization of Chebyshev subspaces in the space of (real or complex) continuously-differentiable functions of two variables. We also discuss various applications of the characterization theorem. Introduction. One of the central problems in approximation theory consists in determining the best approximation; that is, in a normed linear space X with a prescribe...
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ژورنال
عنوان ژورنال: Transactions of the American Mathematical Society
سال: 1985
ISSN: 0002-9947
DOI: 10.1090/s0002-9947-1985-0768745-8