On 6 Sep 2017, at 20:58, Matthew Knepley <[email protected]> wrote:

>> 1. The locally visible part of a distributed mesh (so that I can
>> discretise and solve independent problems on each local part)
> 
> This is already a standalone Plex. If you delete the PetscSF, it never knows 
> anyone else is out there :)

So I'd Dmclone and then delete the point SF. Do I not also need to replace the 
communicator on the DM so that VecCreate DTRT.

I'll follow up to the rest with some examples probably next week.

Lawrence

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