Mixed collocation for fractional differential equations
type: Item
instance of: scholarly article
title: Mixed collocation for fractional differential equations
zbMATH Open document ID: 1038.65059
DOI: 10.1023/B:NUMA.0000005367.21295.05
author: Francois Dubois
author: Stéphanie Mengué
published in: Numerical Algorithms
publication date: 2004-01-14T00:00:00Z
review text: This paper is concerned with the numerical solution of the initial value problem for the fractional differential equation of order \( \beta, \) \(( 0 < \beta < 1 )\) given by \( D^{\beta} ( u - u_0) = \Phi ( u(t), t), t>0 \), with \( u - u_0 = 0, t \leq 0\) where \( \Phi \) is a sufficiently regular function and \( D^{\beta}\) is the fractional differential operator in the sense of \textit{Caputo} [Geophys. J. R. Astr. Soc. 13, 529--539 (1967)]. To obtain a scheme that approximates the solution of this problem, the authors introduce the fractional integrator operator \( I^{\beta}\) of order \( \beta \) such that \( I^{\beta} \cdot D^{\beta} \) is the identity operator and they construct a mixed collocation method on \( u(t) - u_0 = I^{\beta} ( \Phi ( u (\cdot), t ) ) \) with a basis of ``hat'' functions similar to the used in mixed finite elements. Some numerical experiments, with linear and non linear \( \Phi \)-functions and fractional order \( \beta = 1/2, \) are presented. In particular, interesting numerical results are obtained for Joulin model of spherical flames that possess a singularity whose detection depends on the grid size.
Mathematics Subject Classification ID: 65L05
Mathematics Subject Classification ID: 34A34
Mathematics Subject Classification ID: 80A25
Mathematics Subject Classification ID: 26A33
Mathematics Subject Classification ID: 65L60
zbMATH DE Number: 2026781
zbMATH Keywords: fractional differential equations
zbMATH Keywords: initial value problems
zbMATH Keywords: mixed finite elements
zbMATH Keywords: numerical experiments
zbMATH Keywords: spherical flames
reviewed by: Manuel Calvo
MaRDI profile type: Publication
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description: scientific article; zbMATH DE number 2026781