[petsc-dev] Mat/DM dependency

[Matthew Knepley]

On Sat, Jan 2, 2010 at 12:44 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
> On Jan 1, 2010, at 7:12 PM, Jed Brown wrote:
>
>  On Fri, 1 Jan 2010 14:50:33 -0600, Matthew Knepley <knepley at gmail.com>
>> wrote:
>>
>>> That is definitely a problem.
>>>
>>
>  I am not convinced yet that this is a problem. The dependency is only in
> one specific Mat implementation that should not require pulling in the DM
> library unless that specific Mat implementation is specifically used. Since
> that specific Mat implementation is not used in the Mat examples it should
> not require pulling in the DM library.
>

If it is not a practical problem, I still believe it is a conceptual
problem.

  Matt


>   Barry
>
>
>
>  It makes me think we need an R^N part just
>>> like we have now, and then a more general part with operators on fiber
>>> bundles.
>>>
>>
>> The question is whether it is important to separate that stuff (which
>> depends on both Vec and DM) from DM (which already depends on Vec).
>>
>> Jed
>>
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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