Skip to main content
SpringerLink
Log in

A family of extremal subspaces

  • Brief Communications
  • Published:
Ukrainian Mathematical Journal Aims and scope

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Literature cited

  1. N. P. Korneichuk, Extremal Problems of Approximation Theory [in Russian], Nauka, Moscow (1976).

    Google Scholar 

  2. A. A. Sazanov, “The asymptotic behavior of widths of classes of functions defined by a differential operator,” in: Approximation of Functions by Polynomials and Splines [in Russian], Ural Sci. Center, USSR Academy of Sciences, Sverdlovsk (1985), pp. 127–139.

    Google Scholar 

  3. A. K. Kushpel', “Extremal properties of splines and widths of classes of periodic functions in the space 643-01,” Preprint, Math. Inst., UkrSSR Academy of Sciences, Kiev (1984).

    Google Scholar 

  4. A. K. Kushpel', “sk-Splines and exact estimates of widths of function classes in the space C2π” Preprint, Math. Inst., UkrSSR Academy of Sciences, Kiev (1985).

    Google Scholar 

  5. G. H. Hardy, J. E. Littlewood, and G. Pólya, Inequalities, 2nd ed., Cambridge Univ. Press (1959).

  6. N. P. Korneichuk, A. A. Ligun, and V. G. Doronin, Approximation with Constraints [in Russian], Naukova Dumka, Kiev (1982).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Mathematics, Academy of Sciences of the Ukrainian SSR, Kiev

    A. K. Kushpel'

Authors
  1. A. K. Kushpel'
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 39, No. 6, pp. 786–788, November–December, 1987.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kushpel', A.K. A family of extremal subspaces. Ukr Math J 39, 642–644 (1987). https://doi.org/10.1007/BF01062897

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01062897

Search

Navigation