Skip to main content
Log in

Perturbed Bernstein-type operators

  • Published:
Analysis and Mathematical Physics Aims and scope Submit manuscript

Abstract

The present paper deals with modifications of Bernstein, Kantorovich, Durrmeyer and genuine Bernstein–Durrmeyer operators. Some previous results are improved in this study. Direct estimates for these operators by means of the first and second modulus of continuity are given. Also the asymptotic formulas for the new operators are proved.

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

Data Availability Statement

Data sharing not applicable to this article as no datasets were generated or analysed during the current study.

References

  1. Acu, A.M., Acar, T., Muraru, C.V., Radu, V.A.: Some approximation properties by a class of bivariate operators. Math. Methods Appl. Sci. 42, 5551–5565 (2019)

    Article  MathSciNet  Google Scholar 

  2. Acu, A.M., Bascanbaz-Tunca, G., Cetin, N.: Approximation by certain linking operators. Ann. Funct. Anal. 11, 1184–1202 (2020)

    Article  MathSciNet  Google Scholar 

  3. Acu, A.M., Gonska, H.: Classical Kantorovich operators revisited. Ukr. Math. J. 71, 843–852 (2019)

    Article  MathSciNet  Google Scholar 

  4. Acu, A.M., Agrawal, P.: Better approximation of functions by genuine Bernstein–Durrmeyer type operators. Carpathian J. Math. 35(2), 125–136 (2019)

    MathSciNet  MATH  Google Scholar 

  5. Acu, A.M., Gupta, V., Tachev, G.: Better numerical approximation by Durrmeyer type operators. Results Math. 74, 90 (2019)

    Article  MathSciNet  Google Scholar 

  6. Acu, A.M., Gupta, V., Tachev, G.: Modified Kantorovich operators with better approximation properties. Numer. Algorithms 81, 125–149 (2019)

    Article  MathSciNet  Google Scholar 

  7. Acu, A.M., Rasa, I.: New estimates for the differences of positive linear operators. Numer. Algorithms 73(3), 775–789 (2016)

    Article  MathSciNet  Google Scholar 

  8. Chen, W.: On the modified Durrmeyer–Bernstein operator (in handwritten Chinese). Report of the fifth chinese conference on approximation theory, Zhen Zhou, China (1987)

  9. Durrmeyer, J.L.: Une formule d’inversion de la transformé de Laplace: Applications à la théorie des moments. Thèse de 3e cycle, Paris (1967)

  10. Gavrea, I., Opris, A.A.: Modified Kantorovich–Stancu operators (II). Stud. Univ. Babes-Bolyai Math. 64(2), 197–205 (2019)

    Article  MathSciNet  Google Scholar 

  11. Gonska, H.: Two problems on best constants in direct estimates. In: Ditzian, Z et al. (eds.) Problem section of proc. Edmonton conf. approximation theory, vol. 194. American Mathematical Society, Providence, RI (1983)

  12. Gonska, H., Lupaş, A.: On an algorithm for Bernstein polynomials. In: Lyche, T., Mazure, M.-L., Schumaker, L. (eds.) Curve and Surface Design: Saint Malo, pp. 197–203. Nashboro Press, Brentwood (2002)

    Google Scholar 

  13. Gonska, H., Heilmann, M., Raşa, I.: Kantorovich operators of order k. Numer. Funct. Anal. Optim. 32(7), 717–738 (2011)

    Article  MathSciNet  Google Scholar 

  14. Gonska, H.: Quantitative Korovkin-type theorems on simultaneous approximation. Math. Z. 186, 419–433 (1984)

    Article  MathSciNet  Google Scholar 

  15. Gonska, H., Raşa, I.: A Voronovskaja estimate with second order of smoothness. In: Dumitru, A. et al. (ed) Proceedings of the 5th International Symposium “Mathematical Inequalities”, Sibiu, Romania, September 25–27, 2008, Sibiu, “Lucian Blaga” University Press. ISBN 978-973-739-740-9, pp. 76–90 (2008)

  16. Goodman, T.N.T., Sharma, A.: A modified Bernstein–Schoenberg operator. In: Sendov, B. et al. Proceedings of the Conference on Constructive Theory of Functions, Varna 1987 (pp. 166–173). Publ. House Bulg. Acad. of Sci., Sofia (1988)

  17. Kacsó, D.: Certain Bernstein–Durrmeyer type operators preserving linear functions. Habilitation Thesis, Duisburg-Essen University (2007)

  18. Kantorovich, L.V.: Sur certains developpements suivant les polynômes de la forme de S. Bernstein I, II, Dokl. Akad. Nauk. SSSR , pp. 563–568, 595–600 (1930)

  19. Khosravian-Arab, H., Dehghan, M., Eslahchi, M.R.: A new approach to improve the order of approximation of the Bernstein operators: theory and applications. Numer. Algorithms 77(1), 111–150 (2018)

    Article  MathSciNet  Google Scholar 

  20. Lupaş, A.: Die Folge der Betaoperatoren. Dissertation, Universität Stuttgart (1972)

  21. Opriş, A.A.: Approximation by modified Kantorovich–Stancu operators. J. Inequalities Appl. 2018, 346 (2018)

    Article  MathSciNet  Google Scholar 

  22. Păltănea, R.: Approximation Theory Using Positive Linear Operators. Birkhäuser, Boston (2004)

    Book  Google Scholar 

  23. Zygmund, A.: Smooth functions. Duke Math. J. 12, 47–76 (1945)

    Article  MathSciNet  Google Scholar 

Download references

Acknowledgements

The first author acknowledges the support of Lucian Blaga University of Sibiu under research Grant LBUS-IRG-2020-06. The second one is grateful for the departmental facilities provided during his senior professorship at the University of Duisburg-Essen.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ana-Maria Acu.

Ethics declarations

Conflict of interest

The authors declare no conflict of interest

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Acu, AM., Gonska, H. Perturbed Bernstein-type operators. Anal.Math.Phys. 10, 49 (2020). https://doi.org/10.1007/s13324-020-00389-w

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s13324-020-00389-w

Keywords

Mathematics Subject Classification

Navigation