dolfin team mailing list archive

["Garth N. Wells" <gnw20@xxxxxxxxx>]

Gideon Simpson wrote:
> I'm interested in implementing the Elman et al. preconditioner for 
> Stokes in the fenics suite.  This involves building an approximate schur 
> complement for the block strucutre matrix
> A B^T
> B 0
> representing the weak form of the stokes operator.  has anyone 
> experimented, if not with this sort, some sort of block structure using 
> the fenics front end?

No, when using the default uBLAS backend, there aren't any sophisticated 
preconditioners. You can create a preconditioner which derives from 
uBLASPreconditioner.

You can also look at using PETSc which provides a variety of 
preconditioners.

Garth


> -gideon
>
>
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