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Remark on a paper of Y. Ikebe

Author: Ivan Singer
Journal: Proc. Amer. Math. Soc. 21 (1969), 24-26
MSC: Primary 41.60
MathSciNet review: 0238014
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References [Enhancements On Off] (What's this?)

  • [1] E. W. Cheney, Introduction to approximation theory, McGraw-Hill Book Co., New York-Toronto, Ont.-London, 1966. MR 0222517
  • [2] N. Dunford and J. Schwartz, Linear operators. Part I, Interscience, New York, 1958.
  • [3] Yasuhiko Ikebe, A characterization of best Tchebycheff approximations in function spaces, Proc. Japan Acad. 44 (1968), 485–488. MR 0227682
  • [4] Ivan Singer, Caractérisation des éléments de meilleure approximation dans un espace de Banach quelconque, Acta Sci. Math. Szeged 17 (1956), 181–189 (French). MR 0084620
  • [5] -, Best approximation in normed linear spaces by elements of linear subspaces, Ed. Acad. Repub. Socialíste România, 1967. (Romanian)

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Article copyright: © Copyright 1969 American Mathematical Society