On Mon, Apr 29, 2013 at 9:07 PM, Gaetan Kenway <gaetank at gmail.com> wrote:
> That makes sense. Is there a reasonably easy way of doing that in PETSc > currently for reasonably large systems? Jed is working on it :) Matt > Gaetan > > On Mon, Apr 29, 2013 at 4:32 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote: > >> Gaetan Kenway <gaetank at gmail.com> writes: >> >> > I would be very interested in looking at the problematic eigenmodes as >> > well. On my end I use Tecplot for all my visualization. What sort of >> > visualization technique are you thinking about? Is it the KSP subspace >> > vectors you want to look at? >> >> No, it would be an eigensolve for either outliers or eigenvalues very >> close to zero. The cost to find the vector is like several solves, but >> it would tell us exactly what sort of functions are poorly approximated >> by the preconditioner. Then we would think about how we can change >> algorithms to make the preconditioner correct those functions better. >> > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130429/d07db82e/attachment.html>
