@Article{Kowynia2009,
author = "Kowynia, Joanna",
title = "Best approximation in Chebyshev subspaces of L(l<sub>1</sub><sup>n</sup>,l<sub>1</sub><sup>n</sup>)",
journal = "Opuscula Math.",
year = "2009",
volume = "29",
number = "1",
pages = "57--67",
doi = "http://dx.doi.org/10.7494/OpMath.2009.29.1.57",
url = "http://dx.doi.org/10.7494/OpMath.2009.29.1.57",
abstract = "Chebyshev subspaces of \(\mathcal{L}(l_1^n,l_1^n)\) are studied. A construction of a \(k\)-dimensional Chebyshev (not interpolating) subspace is given.",
keywords = "interpolating subspace, Chebyshev subspace, strongly unique best approximation",
issn = "1232-9274"
}