symmetric reordering and incomplete factorization with tolerance?
z.sheng at ewi.tudelft.nl
Tue Sep 16 10:23:47 CDT 2008
I used the reordering scheme in petsc, and I would like to know whether
they are symmetric or not.
I have a symmetric matrix (for 3D system) and I tried to solve it with
petsc and with matlab.
In petsc I used rcm + ILU + bicgstab. while in matlab I used
it seems that with symmetric reordering, the factorization is somewhat
faster... So I am wondering if it is possible to apply a symmetric
PS: in Matlab, an incomplete factorization can be done with a tolerance
(e.g. ICC(1e-4) ), can I do something like that with Petsc?
Thanks a lot
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