dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Sun, Apr 05, 2009 at 05:11:51PM -0500, Matthew Knepley wrote:
> On Sun, Apr 5, 2009 at 2:54 PM, Anders Logg <logg@xxxxxxxxx> wrote:
> 
>     Dirichlet BC would need to be added in/after each multiplication and
>     it should be possible to build it into the mult() operator and make it
>     efficient.
> 
> 
> I still think the best way to handle this is to eliminate them, as I talked
> about
> last time at Simula.
> 
>   Matt

I think we're in position to do that now with the new FunctionSpace
class. One could allow restrictions to be imposed, for example

  V.restrict(bc);

But I haven't seen any good numbers to indicate it's worth the effort.
How much better is it to eliminate, condition numbers etc for letting
the constrained dofs just sit along?

-- 
Anders

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