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Continuing earlier investigations, we analyze the convergence of operator splitting procedures combined with spatial discretization and rational approximations.

泛函分析 · 数学 2011-03-03 András Bátkai , Petra Csomós , Bálint Farkas , Gregor Nickel

In the present paper, we consider Stancu type generalization of Baskakov-Kantorovich operators based on the q-integers and obtain statistical and weighted statistical approximation properties of these operators. Rates of statistical…

经典分析与常微分方程 · 数学 2015-08-28 Vishnu Narayan Mishra , Preeti Sharma , Adem Kilicman , Dilip Jain

As continuation of the study of polynomial approximation and composition operators on Dirichlet spaces of unit disk, which has settled a problem posed by Cima in 1976, the present paper aims to consider the case of the unbounded domains,…

复变函数 · 数学 2022-02-25 Guangfu Cao , Haichou Li

The existence of uniformly bounded discrete extension operators is established for conforming Raviart-Thomas and N\'ed\'elec discretisations of $H(div)$ and $H(curl)$ on locally refined partitions of a polyhedral domain into tetrahedra.

数值分析 · 数学 2015-03-03 Mark Ainsworth , Johnny Guzmán , Francisco-Javier Sayas

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

While the theory of operator approximation with any given accuracy is well elaborated, the theory of {best constrained} constructive operator approximation is still not so well developed. Despite increasing demands from applications this…

最优化与控制 · 数学 2018-11-09 Anatoli Torokhti , Pablo Soto-Quiros

In this paper, we establish the asymptotic estimates for the norms of the matrix dilation operators on modulation spaces. As an application, we study the boundedness on modulation spaces of Hausdorff operators. The definition of Hausdorff…

经典分析与常微分方程 · 数学 2022-07-20 Weichao Guo , Jiangkun Luo , Guoping Zhao

The paper is concerned with stochastic approximation procedures having three main characteristics: truncations with random moving bounds, a matrix valued random step-size sequence, and a dynamically changing random regression function. We…

统计理论 · 数学 2016-11-14 Teo Sharia , Lei Zhong

Fixed-point equations with Lipschitz operators have been studied for more than a century, and are central to problems in mathematical optimization, game theory, economics, and dynamical systems, among others. When the Lipschitz constant of…

最优化与控制 · 数学 2025-11-12 Jelena Diakonikolas

In this paper we derive higher order convergence rates in terms of the Bregman distance for Tikhonov like convex regularisation for linear operator equations on Banach spaces. The approach is based on the idea of variational inequalities,…

最优化与控制 · 数学 2011-07-14 Markus Grasmair

We consider a sequence of composite Bernstein operators and the quadrature formulae associated with them. Upper bounds for the approximation error of continuous functions and for the approximation of integrals of continuous functions are…

经典分析与常微分方程 · 数学 2014-02-12 Heiner Gonska , Ioan Raşa

In this article, we have introduced (p;q)-variant of Stancu-Schurer operators and discussed the rate of convergence for continuous functions. We have also discussed recursive estimates Korovkin and direct approximation results using second…

数论 · 数学 2016-01-01 Abdul Wafi , Nadeem Rao

This paper is devoted to a new modification of a recently proposed adaptive stochastic mirror descent algorithm for constrained convex optimization problems in the case of several convex functional constraints. Algorithms, standard and its…

最优化与控制 · 数学 2020-01-22 Mohammad S. Alkousa

We prove norm estimates for the difference of resolvents of operators and their discrete counterparts, embedded into the continuum using biorthogonal Riesz sequences. The estimates are given in the operator norm for operators on square…

泛函分析 · 数学 2021-08-11 Horia Cornean , Henrik Garde , Arne Jensen

In this paper, we present a convergence rate analysis for the inexact Krasnosel'skii-Mann iteration built from nonexpansive operators. Our results include two main parts: we first establish global pointwise and ergodic iteration-complexity…

最优化与控制 · 数学 2015-09-17 Jingwei Liang , Jalal Fadili , Gabriel Peyré

As shown in earlier work, skew-adjoint linear differential operators, mapping efforts into flows, give rise to Dirac structures on a bounded spatial domain by a proper definition of boundary variables. In the present paper this is extended…

最优化与控制 · 数学 2021-05-05 Arjan van der Schaft , Bernhard Maschke

In [5], Bede et al. defined the max-product Meyer-K\"{o}nig and Zeller operator. They examined the approximation and shape preserving properties of this operator, and they found the order of approximation to be $\frac{\sqrt{y}\left(…

泛函分析 · 数学 2024-10-04 Sezin Çit Ogun Dogru

This paper studies approximation properties of linear sampling operators in general Banach lattices $X$. We obtain matching direct and inverse approximation estimates, convergence criteria, equivalence results involving special…

泛函分析 · 数学 2026-01-28 Yurii Kolomoitsev

This paper is devoted to studying the maximal-in-time estimates and Strichartz estimates for orthonormal functions and convergence problem of density functions related to Boussinesq operator on manifolds. Firstly, we present the pointwise…

偏微分方程分析 · 数学 2024-11-15 Xiangqian Yan , Yongsheng Li , Wei Yan , Xin Liu

We give sufficient conditions for the continuity in norm of the translation operator in the Musielak-Orlicz LM spaces. An application to the convergence in norm of approximate identities is given, whereby we prove density results of the…

泛函分析 · 数学 2017-10-25 Ahmed Youssfi , Youssef Ahmida