FEM fast iterative solvers
 

Hi everybody,

I am developing a fem-code and I get problems when solving big systems. I use cgstab type algorithms and I think I have to use better preconditioners. Has anybody good references or experience with cgstab-algorithms for FEM. I also tried to use a AMG-solver but it also is very slow. I think I have to treat the u,v,w-displacements in different a more sophisticated way I do. Has anybody also for this problem (AMG for FEM) good references?

Thank you very much...

Re: FEM fast iterative solvers
 

You are sure that your system is symmetric positive definite?