scientific article; zbMATH DE number 3600524
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Publication:4167103
zbMath0386.41026MaRDI QIDQ4167103
Publication date: 1978
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Best approximation, Chebyshev systems (41A50) Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) (41A65) Banach spaces of continuous, differentiable or analytic functions (46E15)
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Chebyshev unions of planes, and their approximative and geometric properties ⋮ On weak Chebyshev subspaces. I: Equioscillation of the error in approximation ⋮ On weak Chebyshev subspaces. II: Continuous selection for the metric projection and extension to Mairhuber's theorem ⋮ Finite-codimensional Chebyshev subspaces in the complex space \(C(Q)\) ⋮ Integrality of the group ring of an almost solvable torsion-free subgroup of \(GL_ n(Q)\) ⋮ An extension to Mairhuber's theorem. On metric projections and discontinuity of multivariate best uniform approximation
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