Heroux, Michael A
maherou at sandia.gov
Sat Oct 21 15:18:30 EDT 2017
No, Epetra_SerialDenseMatrix does not work in parallel.
If your system is not too large, you could consider using the Amesos package. Amesos contains sparse direct solvers that can be very effective with ill-conditioned problems.
From: Trilinos-Users <trilinos-users-bounces at trilinos.org> on behalf of Nishant Narechania <nishantn at umich.edu>
Date: Friday, October 20, 2017 at 9:47 AM
To: Trilinos Users <trilinos-users at trilinos.org>
Subject: [EXTERNAL] [Trilinos-Users] Epetra_SerialDenseMatrix
Can Epetra_SerialDenseMatrix <https://trilinos.org/docs/dev/packages/epetra/doc/html/classEpetra__SerialDenseMatrix.html> be used in a parallel setting? I am trying to solve a large, sparse, ill-conditioned linear system using Epetra_CrsMatrix but it does not converge as it is too ill-conditioned for even the MultiLevel ML-class Preconditioners. I found suggestions online about using Epetra_SerialDenseMatrix<https://trilinos.org/docs/dev/packages/epetra/doc/html/classEpetra__SerialDenseMatrix.html> instead for ill-conditioned systems.
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