Ukrainian Mathematical Journal

, Volume 41, Issue 4, pp 493–496 | Cite as

Estimates of the widths of classes of analytic functions

  • A. K. Kushpel
Brief Communications
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Keywords

Analytic Function 
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Literature cited

  1. 1.
    A. N. Kolmogorov, “über die besste AnnÄherung von Funktionen einer gegeben FunktioClasses,” Ann. Math.,37, 107–110 (1936).Google Scholar
  2. 2.
    V. M. Tikhomirov, Certain Questions of Approximation Theory [in Russian], Moscow State Univ. (1976).Google Scholar
  3. 3.
    A. K. Kushpel', Widths of Classes of Smooth Functions in the Space Lq [in Russian], Preprint, Inst. Mat., Akad. Nauk Ukr. SSR, No. 87. 44, Kiev (1987).Google Scholar
  4. 4.
    A. K. Kushpel', sk-Splines and Sharp Estimates of Widths of Functional Classes in the Space C2π [in Russian], Preprint, Inst. Mat., Akad. Nauk Ukr.SSR, No. 85.51, Kiev (1984).Google Scholar
  5. 5.
    A. K. Kushpel', “Sharp estimates of widths of convolution classes in the space C2π,”Tr. Mat. Inst. Akad. Nauk SSSR,180, 148–149 (1987).Google Scholar
  6. 6.
    A. K. Kushpel', “Sharp estimates of widths of convolution classes,” Izv. Akad. Nauk SSSR, Ser. Mat.,52, No. 6, 1315–1332 (1988).Google Scholar

Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • A. K. Kushpel
    • 1
  1. 1.Mathematics InstituteAcademy of Sciences of the Ukrainian SSRKiev

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