The uniform l1 long-time behavior of time discretization for time-fractional partial differential equations with nonsmooth data

2022 ◽  
Vol 124 ◽  
pp. 107644
Author(s):  
Xuehua Yang ◽  
Haixiang Zhang
Keyword(s):  
Partial Differential Equations ◽  
Differential Equations ◽  
Time Discretization ◽  
Time Behavior ◽  
Long Time Behavior ◽  
Fractional Partial Differential Equations ◽  
Partial Differential ◽  
Nonsmooth Data ◽  
Long Time

scholarly journals An approach to construct higher order time discretisation schemes for time fractional partial differential equations with nonsmooth data

2017 ◽  
Vol 20 (5) ◽  
Author(s):  
Neville J. Ford ◽  
Yubin Yan
Keyword(s):  
Partial Differential Equations ◽  
Differential Equations ◽  
Higher Order ◽  
Fractional Partial Differential Equations ◽  
Order Accuracy ◽  
Partial Differential ◽  
Nonsmooth Data ◽  
Standard Time ◽  
Time Discretisation ◽  
Theoretical Results

AbstractIn this paper, we shall review an approach by which we can seek higher order time discretisation schemes for solving time fractional partial differential equations with nonsmooth data. The low regularity of the solutions of time fractional partial differential equations implies standard time discretisation schemes only yield first order accuracy. To obtain higher order time discretisation schemes when the solutions of time fractional partial differential equations have low regularities, one may correct the starting steps of the standard time discretisation schemes to capture the singularities of the solutions. We will consider these corrections of some higher order time discretisation schemes obtained by using Lubich’s fractional multistep methods, L1 scheme and its modification, discontinuous Galerkin methods, etc. Numerical examples are given to show that the theoretical results are consistent with the numerical results.

scholarly journals Stability and Convergence of an Effective Finite Element Method for Multiterm Fractional Partial Differential Equations

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Jingjun Zhao ◽  
Jingyu Xiao ◽  
Yang Xu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Partial Differential Equations ◽  
Differential Equations ◽  
Time Discretization ◽  
Stability And Convergence ◽  
Fractional Partial Differential Equations ◽  
Weak Formulation ◽  
Partial Differential ◽  
Element Method

A finite element method (FEM) for multiterm fractional partial differential equations (MT-FPDEs) is studied for obtaining a numerical solution effectively. The weak formulation for MT-FPDEs and the existence and uniqueness of the weak solutions are obtained by the well-known Lax-Milgram theorem. The Diethelm fractional backward difference method (DFBDM), based on quadrature for the time discretization, and FEM for the spatial discretization have been applied to MT-FPDEs. The stability and convergence for numerical methods are discussed. The numerical examples are given to match well with the main conclusions.

scholarly journals Oscillation criteria of certain fractional partial differential equations

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Di Xu ◽  
Fanwei Meng
Keyword(s):  
Partial Differential Equations ◽  
Differential Equations ◽  
Fractional Derivatives ◽  
Sufficient Conditions ◽  
Riccati Transformation ◽  
Fractional Partial Differential Equations ◽  
Partial Differential ◽  
Oscillation Criteria ◽  
Generalized Riccati Transformation

Abstract In this article, we regard the generalized Riccati transformation and Riemann–Liouville fractional derivatives as the principal instrument. In the proof, we take advantage of the fractional derivatives technique with the addition of interval segmentation techniques, which enlarge the manners to demonstrate the sufficient conditions for oscillation criteria of certain fractional partial differential equations.

Sign in / Sign up

Export Citation Format

Share Document