[petsc-users] Differences between jacobi and bjacobi preconditioner for cg method 1-processor/block

[Jed Brown]

Matthew Knepley <knepley at gmail.com> writes:
> No, Block-Jacobi and Jacobi are completely different. If you are not
> positive definite, you should be using MINRES.

MINRES requires an SPD preconditioner.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 835 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20140519/75b622cc/attachment.pgp>