dolfin team mailing list archive

[kent-and@xxxxxxxxx]

I'm not exactly sure what you are asking. But it is easy to obtain the
matrices
and vectors in the linear system to be solved.

eg.
dolfin/demo/la/trilinos/python/demo.py

shows how to solve the system using Trilinos. You can use dolfin
to make matrices and vectors in PETSc, uBlas, MTL, and Trilinos format.
You can choose to let dolfin solve it for you or you can get the underlying
matrix and solve it with the above LA libraries.

Kent



> Is the linear algebra support in dolfin capable of automatically
> generating the sparse linear system of equations? (I know that ffc
> effectively does this, but note that this question does not involve
> solving a PDE using FEM, but a linear system of equations).
>
> For example, assume we have some busy sets of linear equations and we
> wish to convert them to Ax = b so that we can feed them to the linear
> solvers. Is there any way of automatically obtaining A and b avoiding
> manual calculations and hard-coding?
>
>
> -Ali
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