Rate of convergence of a class of Bézier type operators for functions of bounded variation

Abstract


By using probability methods we introduce a general a class of Bezier type linear operators. The aim of the present paper is to estimate the rate of pointwise convergence of this class for functions of bounded variation\ defined on an interval \(J\). Two cases are analyzed: \(Int\left( J\right)=\left( 0,\infty\right)\) and \(Int\left( J\right)=\left( 0,1\right)\). In a particular case, our operators turn into the Kantorovich-Bezier operators. Also some examples are delivered.

Authors

Octavian Agratini
Department of Mathematics, Babes-Bolyai University, Cluj-Napoca, Romania

Keywords

Approximation process; bounded variation; rate of convergence; Bezier type operators.

Paper coordinates

O. Agratini, Rate of convergence of a class of Bézier type operators for functions of bounded variation, Supplemento ai Rendiconti del Circolo Matematico di Palermo, Serie II, 76 (2005), pp. 177-195.

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About this paper

Journal

Supplemento ai Rendicontin del Circolo Matematico di Palermo

Publisher Name

Circ. Mat. Palermo

DOI
Print ISSN
1592-9531
Online ISSN

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[1] Agratini, O., Linear operators generated by a probability density funciton,  pp. 1-12, In: Advances Constructive Approximation: Vanderbilt 2003, M. Neamtu and E.B. Saff (eds.), Nashboro Press, Brentwood, TN, 2004.
[2] Agratini, O., On the reate of convergence of some integral operators for functions of bounded variation,  Studia Sci. Math. Hungarica, vol. 42 (in print).
[3] Altomare, F., Campiti, M., Korovkin-type Approximaiton Theory and its Applications, de Gruyter Studies in Mathematics, vol. 17, Walter de Gruyter, Berlin, 1994.
[4] Anastassiou, G., Quantitative Approximation, Champan & Hall/CRC, Boca Raton, 2001.
[5] Aniol, G., On the rate of pointwise convergence of the Kantorovich-type operators,  Fasciculi Matematici, 29 (1999), 5-15.
[6] Bojanic, R., Vuilleumier, M., On the rate of convergence of Fourier-Legendre series  of funcitons of bounded variation, J. Approx. Theory, 31 (1981), 67-79.
[7] Bojanic, R., Khan, M.K., Rate of convergence of some operators of funcitons with derivatives of bounded variation,  Atti. Sem. Mat.Fis. Univ. Modena, 29(1991), 158-170.
[8] Cardaliaguet, P., Euvrard, G.,  Approximation of a function and its derivative with a neural network, Neural Networks, 5(1992), 207-220.
[9] Cheng, F., On the rate of convergence of Bernstein polynomials of functions of bounded variation,  J. Approx. Theory, 39(1983), 259-274.
[10] Guo, S.S., Khan, M.K., On the rate of convergence of some operators of funcitons of bounded variation, J. Approx. Theory, 58(1989), 90-101.
[11] Gupta, V., The Bezier vriant of Kantorovich operators, Computers and Mathematics with Applicaitons, 47(2004), 227-232.
[12] Gypta, V., Abel, U., On the rate of convergence of Beizer variant of Szasz-Durrmeyer operators,  Analysis in Theory and Applicaitons, 19(2003), 1, 81-88.
[13] Gupta, V., Arya, K.V., On the rate of poinwiste convergence of modified Baskakov type operators for funcitons of bounded variation, Kyungpook Math. J., 38 (1998), 283-291.
[14] Gupta, V., Pant, R.P.,  Rate of convergence for the modified Szasz-Mirakyan operators on functions of bounded variation, J. Math. Anal. Appl. 233(1999), 476-483.
[15] Khan, M.K., On the rate convergence of Bernstein power series for  functions of bounded variation, J. Approx. Theory, 57(1989), 90-103.
[16] Lupas, A., Contributions to the theory of approximation by linear operators (in Romanian), Ph. d. Theseis, Babes-Bolyai University Cluj-Napoca, 1975.
[17] Sahai, A., Prasad, G., On the rate convergence for modified Szasz-Mirakyan operators on functions of bounded variatio, Publications de l’Institut Mathematique, Beograd, 53((67)(1993), 73-80.
[18] Zeng, X.-M., On the rate of convergence of the generalized Szasz type operators for funcitons of bounded variation, J. Math. Anal. Appl.,226(1998), 309-325.
[19] Zeng, X.-M, Chen, W., On the rate of convergence of the generalized Durrmeyer type operators for funcitons of bounded variation, J.Approx. Theory, 102(2000), 1-12.
[20] Zeng, X.-M, Gupta, V., Rate of convergence of Baskakov-Bezier type operators for locally bounded funcitons, Computers and Mathematics with Applicaitons, 44(2002), 1445-1453.
[21] Zeng, X.-M., Zhao, J.-N.,I Pointwise approximation by Meyer-Konig and Zeller operators
, Annales Polonici Mathematici, 73(2000), 2, 185-196.

2005

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