[petsc-users] (Fast?) assembly of upper triangle and MatZeroRows

[Jed Brown]

On Mon, Aug 8, 2011 at 14:23, Barry Smith <bsmith at mcs.anl.gov> wrote:

> We have a MatZeroRowsColumns() for MPIAIJ and SeqSBAIJ, what about having
> one for MPISBAIJ?


Of course this makes sense to have, but I don't think it solves the problem.
How do you solve more than one system? How would you use this interface with
SNES?
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