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This article is cited in 1 scientific paper (total in 1 paper)
$2$-Chebyshev Subspaces in the Spaces $L_1$ and $C$
P. A. Borodin M. V. Lomonosov Moscow State University
Abstract:
The $2$-uniqueness subspaces and the finite-dimensional $2$-Chebyshev subspaces of the space $C$ of functions continuous on a Hausdorff compact set and of the space $L_1$ of functions Lebesgue integrable on a set of $\sigma$-finite measure are described. These descriptions are analogs of the well-known Haar and Phelps theorems for ordinary Chebyshev subspaces.
Keywords:
Banach space, Hilbert space, $2$-Chebyshev subspace, $2$-uniqueness subspace, $2$-existence subspace, the space $L_1$ of Lebesgue integrable functions.
Received: 29.09.2010 Revised: 12.12.2010
Citation:
P. A. Borodin, “$2$-Chebyshev Subspaces in the Spaces $L_1$ and $C$”, Mat. Zametki, 91:6 (2012), 819–831; Math. Notes, 91:6 (2012), 770–781
Linking options:
https://www.mathnet.ru/eng/mzm9384https://doi.org/10.4213/mzm9384 https://www.mathnet.ru/eng/mzm/v91/i6/p819
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Abstract page: | 784 | Full-text PDF : | 235 | References: | 74 | First page: | 36 |
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