ml_MultiLevelOperator.h File Reference

Defines an ML preconditioner as a Epetra_Operator derived class. More...

#include "ml_common.h"
#include "Epetra_LinearProblem.h"
#include "Epetra_Object.h"
#include "ml_include.h"

Include dependency graph for ml_MultiLevelOperator.h:

Namespaces
namespace	ML_Epetra
Classes
class	ML_Epetra::MultiLevelOperator
	MultiLevelOperator: An implementation of the Epetra_Operator class. More...

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Detailed Description

Defines an ML preconditioner as a Epetra_Operator derived class.

ML offers two preconditioners suitable for the solution of Epetra_LinearProblem objects. This file define one the two, called MultiLevelOperator (in the ML_Epetra namespace). This preconditioner is simple wrapper of the ML_Solve() function, so that ML can be applied to Epetra_MultiVector's.

When you should use MultiLevelOperator:

• when your code already defines the required ML objects, with the optimal choice of parameters, and you want to use ML for Epetra_LinearProblem or AztecOO problems;

When you should use MultiLevelPreconditioner:

• when you have an Epetra_RowMatrix, and you don't want to code the conversion to ML_Operator, the creation of the hierarchy and the aggregates, and/or you want to experiment various combinations of the parameters, simply changing some parameters in a Teuchos::ParameterList.

Date:

Last update to Doxygen: 22-Jul-04

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