[petsc-dev] Problem with SLEPC Eigenvalue Problem Solver
Ricardo Marquez
ricardo.marquez.88 at gmail.com
Tue Oct 22 07:39:16 CDT 2013
Hi, I'm trying to solve a vibration generalized eigenvalue problem like
this:
| K C | = lambda* | M 0 |
| C^t 0 | | 0 0 |
I have try a lot of convinations eigensolvers, KSP and PC, but I can't make
that it works.
I use the ST shift-and-invert to get the firsts 5 eigenvalues.
If I use PC or ST_PC = LU or CHOLESKY, I get the zero pivot message error.
If I use PC and ST_PC = NONE, the 5 eigenvalues that find the solver are
exactly the same and equal to the shift value.
If I use PC = jacobi or bjacobi, the eigenvalues get a very big value.
Does anyone knows how this kind of problem solve?
thanks!
--
Ricardo Márquez
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20131022/e1ef902b/attachment.html>
More information about the petsc-dev
mailing list