A Parameter-Uniform Finite Difference Method for Multiscale Singularly Perturbed Linear Dynamical Systems

Details A Parameter-Uniform Finite Difference Method for Multiscale Singularly Perturbed Linear Dynamical Systems A Parameter-Uniform Finite Difference Method for Multiscale Singularly Perturbed Linear Dynamical Systems

2009-03-10

arxiv.org/abs/0903.1795v1

Mathematics

Numerical Analysis

12 pages, 0 figures

Scientific paper

A system of singularly perturbed ordinary differential equations of first order with given initial conditions is considered. The leading term of each equation is multiplied by a small positive parameter. These parameters are assumed to be distinct and they determine the different scales in the solution to this problem. A Shishkin piecewise--uniform mesh is constructed, which is used, in conjunction with a classical finite difference discretization, to form a new numerical method for solving this problem. It is proved that the numerical approximations obtained from this method are essentially first order convergent uniformly in all of the parameters.

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