A posteriori error analysis for defect correction method for two parameter singular perturbation problems
Defect correction method is used for two parameter singular perturbation problem on Bakhvalov-Shishkin mesh. Use of defect correction method on Bakhvalov-Shishkin mesh gives a second order convergence. A posteriori error estimate is obtained. The numerical examples are given to establish the second order convergence in practice.
defect correction two parameters singular perturbations bakhvalov-shishkin mesh 65l12 65l50