Results 41 to 50 of about 400,777 (180)

General Local Convergence Theorems about the Picard Iteration in Arbitrary Normed Fields with Applications to Super–Halley Method for Multiple Polynomial Zeros

open access: yesMathematics, 2020
In this paper, we prove two general convergence theorems with error estimates that give sufficient conditions to guarantee the local convergence of the Picard iteration in arbitrary normed fields. Thus, we provide a unified approach for investigating the
Stoil I. Ivanov
doaj   +1 more source

A piecewise linear FEM for an optimal control problem of fractional operators: error analysis on curved domains [PDF]

open access: yes, 2016
We propose and analyze a new discretization technique for a linear-quadratic optimal control problem involving the fractional powers of a symmetric and uniformly elliptic second oder operator; control constraints are considered.
Otarola, Enrique
core   +2 more sources

A New Mixed Element Method for a Class of Time-Fractional Partial Differential Equations

open access: yesThe Scientific World Journal, 2014
A kind of new mixed element method for time-fractional partial differential equations is studied. The Caputo-fractional derivative of time direction is approximated by two-step difference method and the spatial direction is discretized by a new mixed ...
Yang Liu   +4 more
doaj   +1 more source

Interpolated coefficient characteristic finite element method for semilinear convection–diffusion optimal control problems

open access: yesResults in Applied Mathematics, 2023
In this paper, a fully discrete interpolated coefficient characteristic finite element approximation is proposed for optimal control problems governed by time-dependent semilinear convection–diffusion equations, where the hyperbolic part of the state ...
Xiaowu Li, Yuelong Tang
doaj   +1 more source

A Coupling Method of New EMFE and FE for Fourth-Order Partial Differential Equation of Parabolic Type

open access: yesAdvances in Mathematical Physics, 2013
We propose and analyze a new numerical method, called a coupling method based on a new expanded mixed finite element (EMFE) and finite element (FE), for fourth-order partial differential equation of parabolic type.
Yang Liu   +4 more
doaj   +1 more source

A priori error estimates for the optimal control of laser surface hardening of steel [PDF]

open access: yes, 2010
A priori error estimates for the optimal control of laser surface hardening of ...
Amiya K   +5 more
core   +1 more source

A Type of Multigrid Method Based on the Fixed-Shift Inverse Iteration for the Steklov Eigenvalue Problem

open access: yesAdvances in Mathematical Physics, 2016
For the Steklov eigenvalue problem, we establish a type of multigrid discretizations based on the fixed-shift inverse iteration and study in depth its a priori/a posteriori error estimates.
Feiyan Li, Hai Bi
doaj   +1 more source

On Dual-Weighted Residual Error Estimates for p-Dependent Discretizations [PDF]

open access: yes, 2011
This report analyzes the behavior of three variants of the dual-weighted residual (DWR) error estimates applied to the p-dependent discretization that results from the BR2 discretization of a second-order PDE. Three error estimates are assessed using two
Darmofal, David L., Yano, Masayuki
core   +1 more source

Superconvergence of semidiscrete finite element methods for bilinear parabolic optimal control problems

open access: yesJournal of Inequalities and Applications, 2017
In this paper, a semidiscrete finite element method for solving bilinear parabolic optimal control problems is considered. Firstly, we present a finite element approximation of the model problem.
Yuelong Tang, Yuchun Hua
doaj   +1 more source

Regularization of the fractional Rayleigh–Stokes equation using a fractional Landweber method

open access: yesAdvances in Difference Equations, 2020
In this paper, we consider a time-fractional backward problem for the fractional Rayleigh–Stokes equation in a general bounded domain. We propose a fractional Landweber regularization method for solving this problem.
Nguyen Hoang Luc   +3 more
doaj   +1 more source

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