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ON ESTIMATION OF UNIFORM CONVERGENCE OF ANALYTIC FUNCTIONS BY (p, q)-BERNSTEIN OPERATORS

  • Mursaleen, M. (Department of Mathematics Aligarh Muslim University) ;
  • Khan, Faisal (Department of Mathematics Aligarh Muslim University) ;
  • Saif, Mohd (Department of Mathematics Aligarh Muslim University) ;
  • Khan, Abdul Hakim (Department of Mathematics Aligarh Muslim University)
  • Received : 2019.02.17
  • Accepted : 2019.06.07
  • Published : 2019.06.30

Abstract

In this paper we study the approximation properties of a continuous function by the sequence of (p, q)-Bernstein operators for q > p > 1. We obtain bounds of (p, q)-Bernstein operators. Further we prove that if a continuous function admits an analytic continuation into the disk $\{z:{\mid}z{\mid}{\leq}{\rho}\}$, then $B^n_{p,q}(g;z){\rightarrow}g(z)(n{\rightarrow}{\infty})$ uniformly on any compact set in the given disk $\{z:{\mid}z{\mid}{\leq}{\rho}\}$, ${\rho}>0$.

Keywords

References

  1. T. Acar, (p, q)-generalization of Sza sz-Mirakyan operators, Math. Methods Appl. Sci. 9 (10) (2016), 2685-2695. https://doi.org/10.1002/mma.3721
  2. T. Acar, A. Aral and S.A. Mohiuddine, Approximation by bivariate (p, q)-Bernstein Kantorovich operators, Iranian Jour. Sci. Techn., Trans A: Science, 42 (2) (2016), 655-662.
  3. T. Acar and A. Mohiuddine, On Kantorovich modification of (p, q)-Baskakov operators, J. Inequal. Appl. (2016), 2016: 98. https://doi.org/10.1186/s13660-016-1045-9
  4. S.N. Bernstein, Demonstration du theoreme de Weierstrass fondee sur la calcul des probabilites, Commun. Soc. Math. Charkow Ser. 13 (1912), 1-2.
  5. H. Bin Jebreen, M. Mursaleen and Ambreen Naaz, Approximation by quaternion (p, q)-Bernstein polynomials and Voronovskaja type result on compact disk, Adv. Difference Equ. 2018 (2018), 448. https://doi.org/10.1186/s13662-018-1906-2
  6. S.G. Gal, Approximation by complex q-Lorentz polynomial, q > 1, Mathematica (Cluj) 54(77) (1) (2012).
  7. U. Kadak, On weighted statistical convergence based on (p, q)-integers and related approximation theorems for functions of two variables, J. Math. Anal. Appl. 443 (2) (2016), 752-764. https://doi.org/10.1016/j.jmaa.2016.05.062
  8. U. Kadak, Weighted statistical convergence based on generalized difference operator involving (p, q)-gamma function and its applications to approximation theorems, J. Math. Anal. Appl., 448 (2) (2017), 1633-1650. https://doi.org/10.1016/j.jmaa.2016.11.084
  9. U. Kadak, V.N. Mishra and S. Pandey, Chlodowsky type generalization of (p, q)-Szasz operators involving Brenke type polynomials, Revista de la Real Academia de Ciencias Exactas, FiIsicas y Naturales. Serie A, MatemaIticas (2017), DOI: 10.1007/s13398-017-0439-y.
  10. P.P. Korovkin, Convergence of linear positive operator in the space of contineous function. Dokl. Akad. Nauk. Russian. SSSR (N.S.) 90 (1953), 961-964.
  11. A. Lupas, A q-analogue of the Bernstein operators, seminar on numerical and statistical calculus, University of Cluj-Napoca (1987), 85-92.
  12. V.N. Mishra and S. Pandey, On Chlodowsky variant of (p, q)-Kantorovich-Stancu-Schurer operators, Int. J. Anal. Appl. 11 (1) (2016), 28-39.
  13. V.N. Mishra and S. Pandey, On (p, q) Baskakov-Durrmeyer-Stancu operators, Adv.Appl.Clifford Algebra 27 (2) (2017), 1633-1646. https://doi.org/10.1007/s00006-016-0738-y
  14. M. Mursaleen and M. Ahasan, The Dunkl generalization of Stancu type q-Szasz-Mirakjan-Kantorovich operators and some approximation results, Carpathian J. Math., 34(3) (2018), 363-370. https://doi.org/10.37193/CJM.2018.03.11
  15. M. Mursaleen, K.J. Ansari and A. Khan, On (p, q)-analogue of Bernstein operators, Appl. Math. Comput. 266 (2015), 874-882. Erratum: Appl. Math. Comput. 278 (2016), 70-71. https://doi.org/10.1016/j.amc.2015.04.090
  16. M. Mursaleen, F. Khan and A. Khan, Approximation by (p, q)-Lorentz polynomial on a compact disk, Complex. Anal. Oper. Theory, 10 (8) (2016), 1725-1740. https://doi.org/10.1007/s11785-016-0553-4
  17. M. Mursaleen, Md. Nasiruzzaman, F. Khan and A. Khan, (p, q)-analogue of divided difference and Bernstein operators, J. Nonlinear. Funct. Anal. 2017 (2017), Article ID 25.
  18. M. Mursaleen, Ambreen Naaz and Asif Khan, Improved approximation and error estimations by King type (p, q)-Szasz-Mirakjan-Kantorovich operators, Appl. Math. Comput. 348 (2019), 175-185. https://doi.org/10.1016/j.amc.2018.11.044
  19. M. Mursaleen, S. Rahman and A.H. Alkhaldi, Convergence of iterates of q-Bernstein and (p, q)-Bernstein operators and the Kelisky-Rivlin type theorem, Filomat 32 (12) (2018), (to appear).
  20. S. Ostrovska, q-Bernstein polynomial of the Cauchy kernel, Appl. Math. Comput., 198 (1) (2008), 261-270. https://doi.org/10.1016/j.amc.2007.08.066
  21. S. Ostrovska, q-Bernstein polynomial and their iterates, Jour. Approx. Theory 123 (2003), 232-255. https://doi.org/10.1016/S0021-9045(03)00104-7
  22. G.M. Phillips, Bernstein polynomials based on the q-integers, Ann. Numer. Math. 4 (1997), 511-518.
  23. G.M. Phillips, A generalization of the Bernstein polynomial based on the q-integers. ANZIAMZ, 42 (2000), 79-86. https://doi.org/10.1017/S1446181100011615