Research Article

Complex Perturbed Bernstein-Schurer-Type Operators

Volume: 38 Number: 4 December 1, 2025
EN

Complex Perturbed Bernstein-Schurer-Type Operators

Abstract

In the present paper, we describe a new generalization of complex Bernstein-Schurer operators. We attain quantitative upper estimates for the convergence, lower estimates from a qualitative Voronovskaya type result and afterwards establish the exact degree of simultaneous approximation by the specified operator attached to analytical functions in a disk centered at the origin having radius greater than one.

Keywords

References

  1. [1] Anastassiou, G.A., Gal, S.G., “Approximation by complex Bernstein-Schurer and Kantorovich-Schurer polynomials in compact disks”, Computers and Mathematics with Applications, 58: 734–743, (2009). DOI: https://doi.org/10.1016/j.camwa.2009.04.009
  2. [2] Gal, S.G., Approximation by Complex Bernstein and Convolution Type Operators, Series on Concrete and Applicable Mathematics, vol. 8. World Scientific Publishing Co. Pte. Ltd., Hackensack, NJ, 1–336, (2009).
  3. [3] Dzyadyk, V.K., Shevchuk, I.A., Theory of uniform approximation of functions by polynomials, Walter de Gruyter GmbH & Co. KG, Berlin, 1–437, (2008).
  4. [4] Çetin, N., “A new complex generalized Bernstein-Schurer operator”, Carpathian Journal of Mathematics, 37(1): 81–89, (2021). DOI: https://doi.org/10.37193/CJM.2021.01.08
  5. [5] Khosravian-Arab, H., Dehghan, M., Eslahchi, M.R., “A new approach to improve the order of approximation of the Bernstein operators: Theory and applications”, Numerical Algorithms, 77(1): 111–150, (2018). DOI: https://doi.org/10.1007/s11075-017-0307-z
  6. [6] Acu, A.M., Gupta, V., Tachev, G., “Better numerical approximation by Durrmeyer type operators”, Results in Mathematics, 74: 90, (2019). DOI: https://doi.org/10.1007/s00025-019-1019-6
  7. [7] Acu, A.M., Gonska, H., “Perturbed Bernstein-type operators”, Analysis and Mathematical Physics, 10: 49, (2020). DOI: https://doi.org/10.1007/s13324-020-00389-w
  8. [8] Acu, A.M., Başcanbaz-Tunca, G., Çetin, N., “Approximation by certain linking operators”, Annals of Functional Analysis, 11: 1184–1202, (2020). DOI: https://doi.org/10.1007/s43034-020-00081-x

Details

Primary Language

English

Subjects

Real and Complex Functions (Incl. Several Variables), Approximation Theory and Asymptotic Methods

Journal Section

Research Article

Early Pub Date

November 15, 2025

Publication Date

December 1, 2025

Submission Date

December 8, 2024

Acceptance Date

September 15, 2025

Published in Issue

Year 2025 Volume: 38 Number: 4

APA
Çetin, N. (2025). Complex Perturbed Bernstein-Schurer-Type Operators. Gazi University Journal of Science, 38(4), 2065-2077. https://doi.org/10.35378/gujs.1598374
AMA
1.Çetin N. Complex Perturbed Bernstein-Schurer-Type Operators. Gazi University Journal of Science. 2025;38(4):2065-2077. doi:10.35378/gujs.1598374
Chicago
Çetin, Nursel. 2025. “Complex Perturbed Bernstein-Schurer-Type Operators”. Gazi University Journal of Science 38 (4): 2065-77. https://doi.org/10.35378/gujs.1598374.
EndNote
Çetin N (December 1, 2025) Complex Perturbed Bernstein-Schurer-Type Operators. Gazi University Journal of Science 38 4 2065–2077.
IEEE
[1]N. Çetin, “Complex Perturbed Bernstein-Schurer-Type Operators”, Gazi University Journal of Science, vol. 38, no. 4, pp. 2065–2077, Dec. 2025, doi: 10.35378/gujs.1598374.
ISNAD
Çetin, Nursel. “Complex Perturbed Bernstein-Schurer-Type Operators”. Gazi University Journal of Science 38/4 (December 1, 2025): 2065-2077. https://doi.org/10.35378/gujs.1598374.
JAMA
1.Çetin N. Complex Perturbed Bernstein-Schurer-Type Operators. Gazi University Journal of Science. 2025;38:2065–2077.
MLA
Çetin, Nursel. “Complex Perturbed Bernstein-Schurer-Type Operators”. Gazi University Journal of Science, vol. 38, no. 4, Dec. 2025, pp. 2065-77, doi:10.35378/gujs.1598374.
Vancouver
1.Nursel Çetin. Complex Perturbed Bernstein-Schurer-Type Operators. Gazi University Journal of Science. 2025 Dec. 1;38(4):2065-77. doi:10.35378/gujs.1598374