[petsc-users] Coarsening vectors

[Jed Brown]

On Fri, Apr 6, 2012 at 17:56, Mohamad M. Nasr-Azadani <mmnasr at gmail.com>wrote:

> I just noticed the command DMCoarsen().
> I was wondering if there is a simple command which copies the values of
> the (global) vector created via the fine DM into the coarse DM?
>

with petsc-dev or petsc-3.2 respectively,

http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/DM/DMCreateInterpolation.html
http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/DM/DMGetInterpolation.html

then

http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatRestrict.html
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