SINGULAR PERTURBATION;
FINITE ELEMENT METHOD;
UNIFORM CONVERGENCE;
D O I:
10.1007/BF02238077
中图分类号:
TP301 [理论、方法];
学科分类号:
081202 ;
摘要:
We analyze a new nonconforming Petrov-Galerkin finite element method for solving linear singularly perturbed two-point boundary value problems without turning points. The method is shown to be convergent, uniformly in the perturbation parameter, of order h1/2 in a norm slightly stronger than the energy norm. Our proof uses a new abstract convergence theorem for Petrov-Galerkin finite element methods.