|
This article is cited in 9 scientific papers (total in 9 papers)
Conditional Chebyshev center of a bounded set of continuous functions
A. L. Garkavi, V. N. Zamyatin
Abstract:
Subspaces $\{\mathscr L^n\}$ of codimension $n<\infty$ of the space $C(T)$ of functions, continuous in a bicompactum $T$, are considered. A criterion, whereby a subspace $\mathscr L^n$, contains a Chebyshev center for any bounded set of $C(T)$, is established in terms of the properties of the supports of measures which are annihilated in $\mathscr L^n$. This criterion is equivalent to the following conditions: $\mathscr L^n$ contains an element of best approximation for every $x\in C(T)$, and the support of every measure, which is annihilated in $\mathscr L^n$, is extremally unconnected with respect to the bicompactum $T$.
Received: 24.06.1974
Citation:
A. L. Garkavi, V. N. Zamyatin, “Conditional Chebyshev center of a bounded set of continuous functions”, Mat. Zametki, 18:1 (1975), 67–76; Math. Notes, 18:1 (1975), 622–627
Linking options:
https://www.mathnet.ru/eng/mzm7627 https://www.mathnet.ru/eng/mzm/v18/i1/p67
|
Statistics & downloads: |
Abstract page: | 241 | Full-text PDF : | 95 | First page: | 1 |
|