The finite element method for a boundary value problem with strong singularity
The paper deals with elliptic boundary value problems when the coefficients degenerate in the neighborhood of singular points. Weights in the Sobolev spaces are the remedy. There is some similarity with the use of weighted Sobolev spaces in the treatment of domains with reentrant corners.
elliptic equations with strong singularities
scientific article; zbMATH DE number 5724554
scientific article