dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Tue, Jul 22, 2008 at 05:05:45PM +0200, Martin Sandve Alnæs wrote:
> UFC 1.1 already has a function for tabulating the number of dofs
> associated with each mesh entity, but I don't think FFC implements UFC
> 1.1 completely yet.

True. FFC does not yet implement tabulate_entity_dofs but it would be
fairly easy to add.

> Shouldn't this be all that's needed from FFC for
> DOLFIN to compute/estimate the max non-zeroes per row? Sum the local
> dimension of all elements and subtract the number of dofs for each
> entity shared by neighbouring elements.

How should this be done? It seems that to do this, we would need to
compute all cell-cell connectivity which is fairly expensive. On the
other hand, we need to compute it anyway to initialize edges and
facets when there are dofs on those entities.

-- 
Anders

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