Ukrainian Mathematical Journal

, Volume 61, Issue 1, pp 112–120 | Cite as

Exact constants in Jackson-type inequalities for L 2-approximation on an axis

  • A. A. Ligun
  • V. G. Doronin

We investigate exact constants in Jackson-type inequalities in the space L 2 for the approximation of functions on an axis by the subspace of entire functions of exponential type.


Entire Function Periodic Function Mathematical Journal Type Inequality Trigonometric Polynomial 


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Copyright information

© Springer Science+Business Media, Inc. 2009

Authors and Affiliations

  • A. A. Ligun
  • V. G. Doronin
    • 1
  1. 1.Dnepropetrovsk National UniversityDnepropetrovskUkraine

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