An Epsilon-uniform Finite Element Method for Singularly Perturbed Boundary Value Problems

Details An Epsilon-uniform Finite Element Method for Singularly Perturbed Boundary Value Problems An Epsilon-uniform Finite Element Method for Singularly Perturbed Boundary Value Problems

2006-02-28

arxiv.org/abs/math/0602643v1

Mathematics

Numerical Analysis

18 pages, 7 figures

Scientific paper

This work develops an epsilon-uniform finite element method for singularly perturbed boundary value problems. A surprising and remarkable observation is illustrated: By moving one node arbitrarily in between its adjacent nodes, the new finite element solution always intersect with original one at fixed point. Using this fact, an effective epsilon-uniform approximation out of boundary is proposed by adding one point only in the grid that contains boundary layer. The thickness of boundary layer is not necessary to be known from priori estimation. Numerical results are carried out and compared to Shishkin mesh for demonstration purpose.

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