On Sun, Nov 4, 2012 at 7:52 AM, Mark F. Adams <mark.adams at columbia.edu>wrote:
> 2) Try using hyper (-pc_type hyper -pc_hypre_type boomeramg). Look at > "PCApply > 448", this should be like 10-20. Configure your systems with > --download-hyper=1 if you do not have it. > Jim, you can use -pc_type hypre (note the spelling "hypre", not "hyper"). > > 3) Why do you say it is ill conditioned? Stretched grids? large jumps in > material coefficients? Why do you think it is illoconditioned? > This question is important. PETSc devs, we may need to write an FAQ about how saying that your problem is "ill-conditioned" is useless, and explaining the sort of context that is necessary to say something useful. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20121104/b111ba47/attachment-0001.html>
