On Tue, Jan 20, 2009 at 10:36, Derek Gaston wrote:
> Currently we have to get
> ahold of the KSP object for each system and manually twiddle the
> options with Petsc calls
Set a prefix any time you have more than 1 KSP or SNES object. Then
you can put this twiddling in a config file (see -option
On Tue, 20 Jan 2009, Derek Gaston wrote:
> I suppose I could just add a MultigridLinearSolver object... and
> concrete implementations of it... but that kind of goes against what
> we have setup with Petsc where there are a lot of actual solvers to
> choose from underneath (including multigrid op
On Jan 20, 2009, at 11:58 AM, John Peterson wrote:
> All I was able to finish was checking in Tim's patch, I didn't have a
> chance to redo the whole NumericMatrix hierarchy yet. It's on my todo
> list but there are day-job things taking up time currently.
Do you want me to stab an interface int
On Tue, Jan 20, 2009 at 09:58, John Peterson wrote:
>> Also... on a related question what do you guys think about
>> providing a Preconditioner base class in libMesh? Concrete
>> implementations of this class would be HyprePreconditioner,
>> MLPreconditioner, LinearSolvePreconditioner, etc...
On Tue, Jan 20, 2009 at 12:49 PM, Derek Gaston wrote:
> I know there was a lot of discussion that led up to adding the
> ShellMatrix object to libMesh and looking back through it I see
> that preconditioning was mentioned... but now that I'm looking at the
> code I don't see a straight forward
I know there was a lot of discussion that led up to adding the
ShellMatrix object to libMesh and looking back through it I see
that preconditioning was mentioned... but now that I'm looking at the
code I don't see a straight forward way to add a ShellMatrix as a
preconditioner but m
