Skip to main content
Log in

A Note on the Degree of Approximation by Matrix Means in the Generalized Hölder Metric

  • Published:
Ukrainian Mathematical Journal Aims and scope

The aim of the paper is to determine the degree of approximation of functions by matrix means of their Fourier series in a new space of functions introduced by Das, Nath, and Ray. In particular, we extend some results of Leindler and some other results by weakening the monotonicity conditions in the results obtained by Singh and Sonker for some classes of numerical sequences introduced by Mohapatra and Szal and present new results by using matrix means.

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

Access this article

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

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. P. Chandra, “Trigonometric approximation of functions in L p -norm,” J. Math. Anal. Appl., 275, 13–26 (2002).

    Article  MathSciNet  MATH  Google Scholar 

  2. G. Das, A. Nath, and B. K. Ray, “An estimate of the rate of convergence of Fourier series in generalized H¨older metric,” Anal. Appl., Narosa, New Delhi (2002), pp. 43–60.

    MATH  Google Scholar 

  3. X. Z. Krasniqi, “On the degree of approximation by Fourier series of functions from the Banach space H ω p , p ≥ 1,Generalized Hölder Metric, Int. Math. Forum, 6, No. 13, 613–625 (2011).

  4. L. Leindler, “Trigonometric approximation in L p -norm,” J. Math. Anal. Appl., 302, 129–136 (2005).

    Article  MathSciNet  MATH  Google Scholar 

  5. L. Leindler, “A relaxed estimate of the degree of approximation by Fourier series in generalized Hölder metric,” Anal. Math., 35, 51–60 (2009).

    Article  MathSciNet  MATH  Google Scholar 

  6. S. M. Mazhar and V. Totik, “Approximation of continuous functions by T-means of Fourier series,” J. Approxim. Theory, 60, No. 2, 174–182 (1990).

    Article  MathSciNet  MATH  Google Scholar 

  7. R. N. Mohapatra and B. Szal, “On trigonometric approximation of functions in the Lp-norm,” arXiv:1205.5869v1 [math.CA] (2012).

  8. E. S. Quade, “Trigonometric approximation in the mean,” Duke Math. J., 3, 529–542 (1937).

    Article  MathSciNet  MATH  Google Scholar 

  9. U. Sing and S. Sonker, “Degree of approximation of function f ∈ H ω p class in generalized Hölder metric by matrix means,” Math. Modelling and Sci. Comput., Comm. Comput. Informat. Sci., 283, Pt 1, 1–10 (2012).

  10. G. F. Woronoi, “Extension of the notion of the limit of the sum of terms of an infinite series,” Ann. Math., 2nd Ser., 33, No. 3, 422–428 (1932).

  11. A. Zygmund, Trigonometric Series, Cambridge Univ. Press, Cambridge (1959), Vol. 1.

Download references

Author information

Authors and Affiliations

Authors

Additional information

Published in Ukrains’kyi Matematychnyi Zhurnal, Vol. 68, No. 4, pp. 485–494, April, 2016.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Değer, U. A Note on the Degree of Approximation by Matrix Means in the Generalized Hölder Metric. Ukr Math J 68, 545–556 (2016). https://doi.org/10.1007/s11253-016-1240-3

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11253-016-1240-3

Navigation