Second order parameter-uniform convergence for a finite difference method for a singularly perturbed linear reaction-diffusion system

Details Second order parameter-uniform convergence for a finite difference method for a singularly perturbed linear reaction-diffusion system Second order parameter-uniform convergence for a finite difference method for a singularly perturbed linear reaction-diffusion system

2010-04-05

arxiv.org/abs/1004.0681v1

Mathematics

Numerical Analysis

Scientific paper

A singularly perturbed linear system of second order ordinary differential equations of reaction-diffusion type with given boundary conditions is considered. The leading term of each equation is multiplied by a small positive parameter. These singular perturbation parameters are assumed to be distinct. The components of the solution exhibit overlapping layers. Shishkin piecewise-uniform meshes are introduced, which are used in conjunction with a classical finite difference discretisation, to construct a numerical method for solving this problem. It is proved that the numerical approximations obtained with this method is essentially second order convergent uniformly with respect to all of the parameters.

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