Metric projections of closed subspaces of c0onto subspaces of finite codimension
نویسندگان
چکیده
منابع مشابه
Projections of normed linear spaces with closed subspaces of finite codimension as kernels
It follows from [1] and [7] that any closed n-codimensional subspace (n ≥ 1 integer) of a real Banach space X is the kernel of a projection X → X, of norm less than f(n) + ε (ε > 0 arbitrary), where f(n) = 2 + (n − 1) √ n + 2 n + 1 . We have f(n) < √ n for n > 1, and f(n) = √ n − 1 √ n + O (
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ژورنال
عنوان ژورنال: Colloquium Mathematicum
سال: 2004
ISSN: 0010-1354,1730-6302
DOI: 10.4064/cm99-2-8