[Trilinos-Users] [EXTERNAL] NOX using direct solver MUMPS

Simon-Nicolas Roth simon.roth at videotron.ca
Wed May 23 15:28:11 MDT 2012


OK,

It actually worked by directly usign the parameter:

("Amesos Solver", "Amesos_Mumps");

in the "Linear Solver" sublist.

Any clues about the second questions which is rather simple, but I can't seem 
to find th answer...

Regards
Simon


On Wednesday 23 May 2012 12:40:35 Roger Pawlowski wrote:
> Hi Simon,
> 
> In regards to question #1, Amesos can be used by NOX via the stratimikos
> interface to linear solvers.  NOX uses the stratimikos interface in both
> the src-thyra and src-epetra (NOX_Epetra_LinearSystem_Stratimikos.H)
> layers.  You could use either to get access to Amesos/MUMPS in NOX.
> There are no concrete examples using Amesos in NOX, but it should work.
> 
> Roger
> 
> On 05/23/2012 10:36 AM, Simon-Nicolas Roth wrote:
> > Hi,
> > 
> > I have to simple questions:
> > 
> > 1- Is it possible to use a direct solver such as MUMPS inside NOX;
> > 
> > 2- Is it possible to assemble only half the matrix (lower or upper part)
> > using Epetra_FECrsMatrix if the matrix is symmetric positive definite
> > when solving with Aztecoo or Belos?
> > 
> > Best regards
> > Simon
> > 
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