[Trilinos-Users] design new preconditioner

[Heroux, Michael A]

Giang Bui,

Sorry for the very late reply.  I took an extended vacation and am just coming back up to speed now.

I have attached a class I wrote for an application called Tramonto some years ago.  It provides a Schur complement operator implementation that is fairly general.  I think you could find it very useful as a starting point.  Since it implements the Epetra_Operator interface itself, it can be used as the linear operator for any Trilinos linear solver.  This class also has some useful auxiliary functionality that you might helpful.

Mike

From: Hoang Giang Bui <hgbk2008 at gmail.com<mailto:hgbk2008 at gmail.com>>
Date: Thursday, December 20, 2012 4:19 AM
To: "trilinos-users at software.sandia.gov<mailto:trilinos-users at software.sandia.gov>" <trilinos-users at software.sandia.gov<mailto:trilinos-users at software.sandia.gov>>
Subject: [EXTERNAL] [Trilinos-Users] design new preconditioner

Hi

I want to design a custom preconditioner for my problem using trilinos. For a little bit more detail, my matrix is of type 2x2 block and I want to precond the (1,1) block and its Schur complement's approximation. What I can see now is to subclass the Epetra_Operator and implement method ApplyInverse. Is there a better way to combine existing preconditioners in trilinos to form a new preconditioner? Or is there another interface could support to do so ?

BR
Giang Bui

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