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A higher order numerical method for singularly perturbed elliptic problems with characteristic boundary layers
Announce Type: replace Abstract: A Petrov-Galerkin finite element method is constructed for a singularly perturbed elliptic problem in two space dimensions. The solution contains a regular boundary layer and two characteristic boundary layers. Exponential splines are used as test functions in one coordinate direction and are combined with bilinear trial functions defined on a Shishkin mesh.