yes
On Nov 9, 2012, at 12:26 PM, "A.L. Siahaan" <als88 at cam.ac.uk> wrote:
> Thank's a lot, Mark ! What does 'native' mean here ? That it is PETSc's
> built-in and not interface ?
>
> Antony
>
> On Nov 9 2012, Mark F. Adams wrote:
>
>>> Of all algebraic multigrid implemented or interfaced in PETSc, i.e.
>>> BoomerAMG (PCHypre), ML(PCML), and PCGAMG("agg"), what is the order of the
>>> cost (memory) to set up the preconditioner (setting nullspace etc) ?
>>
>> Not a simple question. ML and GAMG use very similar algorithms and ML is
>> implemented in a more "native" way than hypre (GAMG is completely native).
>> GAMG/ML are probably better for elasticity, hypre is great for 2D low order
>> discretizations of Laplacian, and it is a very hardened implementation.
>> hypre is not native so there are some things that don't work as well.
>>
>>> Regards,
>>> Antony
>
>
