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APPROXIMATION BY COMPLEX SZSZ-DURRMEYER OPERATORS IN COMPACT DISKS 被引量:3
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作者 Sorin G.GAL vijay gupta 《Acta Mathematica Scientia》 SCIE CSCD 2014年第4期1157-1165,共9页
In the present paper, we deal with the complex Szasz-Durrmeyer operators and study Voronovskaja type results with quantitative estimates for these operators attached to analytic functions of exponential growth on comp... In the present paper, we deal with the complex Szasz-Durrmeyer operators and study Voronovskaja type results with quantitative estimates for these operators attached to analytic functions of exponential growth on compact disks. Also, the exact order of approximation is found. 展开更多
关键词 complex Szasz-Durrmeyer operators Voronovksaja type result exact order of approximation in compact disks simultaneous approximation
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A NOTE ON MODIFIED BASKAKOV TYPE OPERATORS 被引量:7
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作者 vijay gupta 《Analysis in Theory and Applications》 1994年第3期74-78,共5页
In the present paper, we define a new kind of positive linear operators and study the rate of convergence in simultaneous approximation. This operator being capable of providing better approxima- tion than modified Ba... In the present paper, we define a new kind of positive linear operators and study the rate of convergence in simultaneous approximation. This operator being capable of providing better approxima- tion than modified Baskakov operators. 展开更多
关键词 A NOTE ON MODIFIED BASKAKOV TYPE OPERATORS THAN
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ASYMPTOTIC APPROXIMATION OF FUNCTIONS AND THEIR DERIVATIVES BY GENERALIZED BASKAKOV-SZAZS-DURRMEYER OPERATORS 被引量:1
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作者 Ulrich Abel vijay gupta Mircea Ivan 《Analysis in Theory and Applications》 2005年第1期15-26,共12页
We present the complete asymptotic expansion for a generalization of the Baskakov-Szasz-Durrmeyer operators and their derivatives.
关键词 approximation by positive operators rate of convergence degree of approximation asymptotic expansion Stirling numbers
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A SHARP ESTIMATE ON THE DEGREE OF APPROXIMATION TO FUNCTIONS OF BOUNDED VARIATION BY CERTAIN OPERATORS 被引量:1
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作者 vijay gupta 《Analysis in Theory and Applications》 1995年第3期106-107,共2页
Recently Guo introduced integrated Meyer -Konig and Zeller operators and studied the rate of convergence for function of bounded variation. In this note we give a sharp estimate for these operators.
关键词 A SHARP ESTIMATE ON THE DEGREE OF APPROXIMATION TO FUNCTIONS OF BOUNDED VARIATION BY CERTAIN OPERATORS
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Approximation by a Complex Post-Widder Type Operator
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作者 Sorin G.Gal vijay gupta 《Analysis in Theory and Applications》 CSCD 2018年第4期297-305,共9页
In the present article, we deal with the so-called overconvergence phenomenon in C of a slightly modified Post-Widder operator of real variable, that is with the extension of its approximation properties from the real... In the present article, we deal with the so-called overconvergence phenomenon in C of a slightly modified Post-Widder operator of real variable, that is with the extension of its approximation properties from the real axis in the complex plane.In this sense, error estimates in approximation and a quantitative Voronovskaya-type asymptotic formula are established. 展开更多
关键词 Real and complex Post-Widder type operator overconvergence phenomenon approximation estimate Voronovskaya-type result exact error estimation
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Approximation by Complex Baskakov-Szsz-Durrmeyer Operators in Compact Disks
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作者 Sorin G.Gal vijay gupta 《Analysis in Theory and Applications》 CSCD 2015年第2期207-220,共14页
In this paper, we deal with the complex Baskakov-Szasz-Durrmeyer mixed operators and study Voronovskaja type results with quantitative estimates for these operators attached to analytic functions of exponential growth... In this paper, we deal with the complex Baskakov-Szasz-Durrmeyer mixed operators and study Voronovskaja type results with quantitative estimates for these operators attached to analytic functions of exponential growth in DR = {z ∈ C; |z| 〈 R}. Also, the exact order of approximation is found. The method used allows to construct complex Szasz-type and Baskakov-type approximation operators without involving the values on [0,∞). 展开更多
关键词 Complex Baskakov-Szzsz-Durrmeyer operators Voronovskaja type result exact or-der of approximation in compact disks simultaneous approximation.
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Simultaneous Approximation for Szsz-Mirakian-Stancu-Durrmeyer Operators
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作者 vijay gupta Naokant Deo Xiaoming Zeng 《Analysis in Theory and Applications》 2013年第1期86-96,共11页
The aim of this work is to generalize Szasz-Mirakian operator in the sense of Stancu-Durrmeyer operators. We obtain approximation properties of these operators. Here we study asymptotic as well as rate of convergence ... The aim of this work is to generalize Szasz-Mirakian operator in the sense of Stancu-Durrmeyer operators. We obtain approximation properties of these operators. Here we study asymptotic as well as rate of convergence results in simultaneous approximation for these modified operators. 展开更多
关键词 Szasz-Mirakian-Stancu-Durrmeyer operator simultaneous approximation asymp- totic rate of convergence.
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Approximation by q Baskakov Beta Operators 被引量:2
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作者 vijay gupta Ali ARAL 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2011年第4期569-580,共12页
In the present paper we introduce the q analogue of the Baskakov Beta operators. We establish some direct results in the polynomial weighted space of continuous functions defined on the interval [0, ∞). Then we obta... In the present paper we introduce the q analogue of the Baskakov Beta operators. We establish some direct results in the polynomial weighted space of continuous functions defined on the interval [0, ∞). Then we obtain point-wise estimate, using the Lipschitz type maximal function. 展开更多
关键词 q-Baskakov operators q-Baskakov-Beta operators modulus of continuity K-FUNCTIONAL weighted approximation rate of approximation q-Beta integral
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On Bounded Variation Functions by General MKZD Operators
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作者 vijay gupta 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2007年第8期1457-1462,共6页
In this paper, we study the rate of convergence for functions of bounded variation for the recently introduced Bzier variant of the Meyer-Knig-Zeller-Durrmeyer operators.
关键词 approximation by positive operators rate of convergence degree of approximation functions of bounded variation total variation
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Approximation by Complex q-Durrmeyer Polynomials in Compact Disks
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作者 N.I.Mahmudov vijay gupta 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2014年第1期65-74,共10页
In this paper, the order of approximation and Voronovskaja type results with quantitative estimate for complex q-Durrmeyer polynomials attached to analytic functions on compact disks are obtained.
关键词 q-complex Durrmeyer polynomials q-integers q-derivatives Voronovskaja-type asymptotic for-mula
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