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The main object of this paper is to construct new Durrmeyer type operators which have better features than the classical one. Some results concerning the rate of convergence and asymptotic formulas of the new operator are given. Finally,…

数值分析 · 数学 2018-10-17 Ana Maria Acu , Vijay Gupta , Gancho Tachev

In this paper, the problem of the order of approximation for the multivariate sampling Kantorovich operators is studied. The cases of the uniform approximation for uniformly continuous and bounded functions/signals belonging to Lipschitz…

泛函分析 · 数学 2014-11-11 Danilo Costarelli , Gianluca Vinti

In the present paper, we deal with Bernstein-Chlodowsky type operators for approximating functions on the domain. We first present Bernstein-Chlodowsky type operators in two variables and then we discuss some examples of these operators…

综合数学 · 数学 2025-01-08 Sevilay Kirci Serenbay , Rabia Aktaş Karaman

In a recent article, Dumitru Popa proved an operator version of the Korovkin theorem. We recall the quantitative version of the Korovkin theorem obtained by O. Shisha and B. Mond in 1968. In this paper, we obtain a quantitative estimate for…

泛函分析 · 数学 2024-02-22 V. B. Kiran Kumar , P. C. Vinaya

In this paper, the behavior of the sampling Kantorovich operators has been studied, when discontinuous signals are considered in the above sampling series. Moreover, the rate of approximation for the family of the above operators is…

泛函分析 · 数学 2015-08-10 Danilo Costarelli , Anna Maria Minotti , Gianluca Vinti

In the present paper, we consider (p,q)-analogue of the Beta operators and using it, we propose the integral modification of the generalized Bernstein polynomials. We estimate some direct results on local and global approximation. Also, we…

经典分析与常微分方程 · 数学 2016-03-18 Gradimir V. Milovanovic , Vijay Gupta , Neha Malik

In this paper, we construct generalized Baskakov Kantorovich operators. We establish some direct results and then study weighted approximation, simultaneous approximation and statistical convergence properties for these operators. Finally,…

经典分析与常微分方程 · 数学 2015-09-09 P. N. Agrawal , Meenu Goyal

We study the q-analogue of Euler-Maclaurin formula and by introducing a new q-operator we drive to this form. Moreover, approximation properties of q-Bernoulli polynomials is discussed. We estimate the suitable functions as a combination of…

经典分析与常微分方程 · 数学 2017-11-06 Mohammad Momenzadeh , Ibrahim Yusuf Kakangi

This paper establishes comprehensive stability results for quasi-variational inequalities (QVIs) under monotone perturbations of the governing operator. We prove strong convergence of both minimal and maximal solutions when sequences of…

泛函分析 · 数学 2025-12-16 M. H. M. Rashid

We create a new, functional calculus, approach to approximation of C_0-semigroups on Banach spaces. As an application of this approach, we obtain optimal convergence rates in classical approximation formulas for C_0-semigroups. In fact, our…

泛函分析 · 数学 2013-07-08 Alexander Gomilko , Yuri Tomilov

We consider distributed stochastic optimization problems that are solved with master/workers computation architecture. Statistical arguments allow to exploit statistical similarity and approximate this problem by a finite-sum problem, for…

In this paper, we give direct theorems on point wise and global approximation by new variants of Bernstein-Durrmeyer operator, introduced by A.-M. et al.[1].

经典分析与常微分方程 · 数学 2020-05-11 Asha Ram Gairola , Karunesh Kumar Singh

We consider positive, integral-preserving linear operators acting on $L^1$ space, known as stochastic operators or Markov operators. We show that, on finite-dimensional spaces, any stochastic operator can be approximated by a sequence of…

泛函分析 · 数学 2019-06-13 Shirin Moein , Rajesh Pereira , Sarah Plosker

The purpose of this article is to give a Chlodowsky type generalization of Szasz operators defined by means of the Sheffer type polynomials. We obtain convergence properties of our operators with the help of Korovkin's theorem and the order…

经典分析与常微分方程 · 数学 2016-01-06 M. Mursaleen , Khursheed J. Ansari

The aim of this article is to introduce the Kantorovich form of generalized Szasz-type operators involving Charlier polynomials with certain parameters. In this paper we discussed the rate of convergence better error estimates and…

经典分析与常微分方程 · 数学 2015-09-16 Abdul Wafi , Nadeem Rao

This paper establishes an abstract Korovkin-type approximation theorem in general spaces, extending the framework of approximation theory to accommodate broader contexts. A critical result supporting this theorem is the proof that any…

泛函分析 · 数学 2025-09-03 Dilek Söylemez , Mehmet Ünver

This article investigates the convergence properties of s-numbers of certain truncations of bounded linear operators between Banach spaces. We prove a generalized version of a known convergence result for the approximation numbers of…

泛函分析 · 数学 2024-12-18 Deepesh K P

In this paper we prove Korovkin type theorem for iterates of general positive linear operators $T:C\left[ 0,1\right] \rightarrow C\left[ 0,1\right] $ and derive quantitative estimates in terms of modulus of smoothness. In particular, we…

泛函分析 · 数学 2010-12-07 N. I. Mahmudov

We analyze the Lipkin Model using effective operator techniques. We present both analytical and numerical results for effective Hamiltonians. The accuracy of the cluster approximation is investigated.

核理论 · 物理学 2009-11-10 K. J. Abraham , J. P. Vary

This paper deals with the approximations of Durrmeyer type generalization of Szasz-Mirakjan operators. We establish the direct results, quantitative Voronovskaya type theorem, Gruss type theorem, A-statistical convergence, rate of…

泛函分析 · 数学 2019-12-02 Rishikesh Yadav , Ramakanta Meher , Vishnu Narayan Mishra