Skip to main content
Log in

Approximation by p-Faber-Laurent Rational Functions in the Weighted Lebesgue Spaces

  • Published:
Czechoslovak Mathematical Journal Aims and scope Submit manuscript

Abstract

Let L ⊂ C be a regular Jordan curve. In this work, the approximation properties of the p-Faber-Laurent rational series expansions in the ω weighted Lebesgue spaces L p(L, ω) are studied. Under some restrictive conditions upon the weight functions the degree of this approximation by a kth integral modulus of continuity in L p(L, ω) spaces is estimated.

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. S. Y. Alper: Approximation in the mean of analytic functions of class E p. In: Investigations on the Modern Problems of the Function Theory of a Complex Variable. Gos. Izdat. Fiz.-Mat. Lit., Moscow, 1960, pp. 272–286. (In Russian.)

    Google Scholar 

  2. J. E. Andersson: On the degree of polynomial approximation in E p (D). J. Approx. Theory 19 (1977), 61–68.

    Google Scholar 

  3. A. Çavuş and D. M. Israfilov: Approximation by Faber-Laurent rational functions in the mean of functions of the class L p (Γ) with 1 < p < 1 ∞. Approximation Theory App.11 (1995), 105–118.

    Google Scholar 

  4. G. David: Operateurs integraux singulers sur certaines courbes du plan complexe. Ann. Sci. Ecol. Norm. Super. 4 (1984), 157–189.

    Google Scholar 

  5. P. L. Duren: Theory of H p-Spaces. Academic Press, 1970.

  6. E. M. Dyn'kin and B. P. Osilenker:Weighted estimates for singular integrals and their applications. In: Mathematical analysis, Vol. 21. Akad. Nauk SSSR, Vsesoyuz. Inst. Nauchn. i Tekhn. Inform., Moscow, 1983, pp. 42–129. (In Russian.)

    Google Scholar 

  7. D. Gaier: Lectures on Complex Approximation. Birkhäuser-Verlag, Boston-Stuttgart, 1987.

  8. G. M. Golusin: Geometric Theory of Functions of a Complex Variable. Translation of Mathematical Monographs, Vol. 26, AMS, 1969.

  9. E. A. Haciyeva: Investigation of the properties of functions with quasimonotone Fourier coefficients in generalized Nikolsky-Besov spaces. Author's summary of candidates dis-sertation. Tbilisi. (In Russian.)

  10. I. I. Ibragimov and D. I. Mamedhanov: A constructive characterization of a certain class of functions. Dokl. Akad. Nauk SSSR 223 (1975), 35–37; Soviet Math. Dokl. 4 (1976), 820–823.

    Google Scholar 

  11. D. M. Israfilov: Approximate properties of the generalized Faber series in an integral metric. Izv. Akad. Nauk Az. SSR, Ser. Fiz.-Tekh. Math. Nauk 2 (1987), 10–14. (In Russian.)

    Google Scholar 

  12. D. M. Israfilov: Approximation by p-Faber polynomials in the weighted Smirnov class E p (G; ω) and the Bieberbach polynomials. Constr. Approx. 17 (2001), 335–351.

    Google Scholar 

  13. V. M. Kokilashvili: A direct theorem on mean approximation of analytic functions by polynomials. Soviet Math. Dokl. 10 (1969), 411–414.

    Google Scholar 

  14. A. I. Markushevich: Theory of Analytic Functions, Vol. 2. Izdatelstvo Nauka, Moscow, 1968.

    Google Scholar 

  15. B. Muckenhoupt: Weighted norm inequalites for Hardy maximal functions. Trans. Amer. Math. Soc. 165 (1972), 207–226.

    Google Scholar 

  16. P. K. Suetin: Series of Faber Polynomials. Nauka, Moscow, 1984; Cordon and Breach Publishers, 1998.

    Google Scholar 

  17. J. L. Walsh and H. G. Russel: Integrated continuity conditions and degree of approxi-mation by polynomials or by bounded analytic functions. Trans. Amer. Math. Soc. 92 (1959), 355–370.

    Google Scholar 

  18. M. Wehrens: Best approximation on the unit sphere in R n. Funct. Anal. and Approx. Proc. Conf. Oberwolfach. Aug. 9-16, 1980, Basel. 1981, pp. 233–245.

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Israfilov, D.M. Approximation by p-Faber-Laurent Rational Functions in the Weighted Lebesgue Spaces. Czechoslovak Mathematical Journal 54, 751–765 (2004). https://doi.org/10.1007/s10587-004-6423-7

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10587-004-6423-7

Navigation