Application of divided differences to the study of monotonicity of a sequence of D.D. Stancu polynomials

Abstract

The paper is centered on the study of a class of linear positive operators of discrete type introduced in 1983 by D. D. Stancu. These operators depend on a non-negative integer parameter r and on two real parameters α, β. In this note we use the divided differences as fundamental mathematical tools in the investigation of the monotonicity properties of this class of operators.

Authors

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

Keywords

approximation process; Stancu polynomial; divided difference; variation diminishing property; quadrature formula

Paper coordinates

O. Agratini, Application of divided differences to the study of monotonicity of a sequence of D.D. Stancu polynomials, Revue d’Analyse Numerique et de Theorie de l’Approximation, 25 (1996) nos. 1-2, pp. 3-10.

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About this paper

Journal

Revue d’Analyse Numerique et de Theorie de l’Approximation

Publisher Name

Publishing House of The Romanian Academy

Print ISSN

2501-059X

Online ISSN

2457-6794

google scholar link

[1] O. Agratini, On the monotonicity of a sequence of Stancu-Bernstein type operators, Studia Univ.Babes-Bolyai, Mathematica, 42 (1997), 1
[2] T. Popoviciu, Les fonctions convexes, Actualites Sci. Ind. No. 992 (1994).
[3] J.I. Schoenberg, On spline fonctions, inequalities (Sympsium at Wright-Patterson Air Force Base, 1965) Academic Press, New York, 1967, 255-291.
[4] D.D. Stancu, On the monotonicity of the sequence formed by the first order derivatives of the Bernstein polynomials, Math. Zeitschr 98 (1967), 46-51.
[5] D.D. Stancu, Asupra unei generalizări a polinoamelor Bernstein, Studia Univ. Babeș-Bolyai, 14 (1969), fasc. 2, 31-45.
[6] D.D. Stancu, Approximation of functions by means of a new generalized Bernstein operators, Calcolo, vol. 20 (1983), fasc. 2, 211-229.

1996

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