Re: Nonlinear CG

Dear Ben,

As far as I know, non-linear solvers does not exist in ITL.  It is an 
excellent idea and we will likely work on it in the future.  If you 
want to work on this, I'd be happy to support you.

I don't know if that helps you, I've written an interface between PETSc 
and parallel BGL so that one can read out parallel PETSc matrices from 
generic libraries and also access to distributed PETSc vector without 
copying them.  However, it sounds more that you want to use PETSc data 
with in a clearer way than I did. ;-)

Best Regards,
Peter

On 09.01.2007, at 18:01, Ben FrantzDale wrote:

> Dear ITL-devel,
> I'm glad I finally found ITL. It looks like it could be the Right Way 
> to solve a bunch of problems that various closed-source Fortran 
> libraries have attempted.
>
> I am interested in solving large nonlinear minimization problems in 
> parallel. Presently we are experimenting with several CG solvers. The 
> work, but all of them want to see the state vector as a single 
> contiguous array of doubles. The ITL example using PETSc in parallel 
> makes me think there are interesting possibilities for large nonlinear 
> problems as well.
>
> The ITL distribution includes two nonlinear examples, but all of the 
> solvers appear to be linear. Has anyone extended ITL to do nonlinear 
> minimization?
>
> Again, great work.
>
> Thanks,
>    Ben FrantzDale_______________________________________________
> This list is archived at http://www.osl.iu.edu/MailArchives/mtl-devel/
------------
Peter Gottschling, Ph.D.
Research Associate
Open Systems Laboratory
Indiana University
135 Lindley Hall
Bloomington, IN 47405
Tel.: +1-812-855-3608   Fax: +1-812-856-0853
http://www.osl.iu.edu/~pgottsch


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