Abstract
In this paper we construct and analyze two compact monotone finite difference methods to solve singularly perturbed problems of convection–diffusion type. They are defined as HODIE methods of order two and three, i.e., the coefficients are determined by imposing that the local error be null on a polynomial space. For arbitrary meshes, these methods are not adequate for singularly perturbed problems, but using a Shishkin mesh we can prove that the methods are uniformly convergent of order two and three except for a logarithmic factor. Numerical examples support the theoretical results.
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Clavero, C., Gracia, J. & Lisbona, F. High order methods on Shishkin meshes for singular perturbation problems of convection–diffusion type. Numerical Algorithms 22, 73–97 (1999). https://doi.org/10.1023/A:1019150606200
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DOI: https://doi.org/10.1023/A:1019150606200