[petsc-dev] DMDA_*PERIODIC and DMDA_XYZGHOSTED

[Jed Brown]

On Tue, Dec 7, 2010 at 20:45, Barry Smith <bsmith at mcs.anl.gov> wrote:

> Why can you not use VecAXPY() on the local Vecs?


You're absolutely right.  I must have been thinking of error control when I
decided this was a problem.  You need some sort of norms and don't want to
double-count the ghost entries.

Jed
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