An inequality concerning the Chebyshev ball of a bounded subset in a Hilbert space

zbMath0643.46021MaRDI QIDQ1101924

A. A. Astaneh

Publication date: 1987

Published in: Bulletin of the Iranian Mathematical Society (Search for Journal in Brave)

zbMATH Keywords

Chebyshev radiusChebyshev centre

Mathematics Subject Classification ID

Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product) (46C05) Best approximation, Chebyshev systems (41A50) Approximation by arbitrary nonlinear expressions; widths and entropy (41A46)

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