ML_Epetra::MultiLevelOperator Class Reference

MultiLevelOperator: An implementation of the Epetra_Operator class. More...

#include <ml_MultiLevelOperator.h>

Inheritance diagram for ML_Epetra::MultiLevelOperator:

Collaboration diagram for ML_Epetra::MultiLevelOperator:

Public Member Functions
	MultiLevelOperator (ML *ml_handle, const Epetra_Comm &myComm, const Epetra_Map &DomainMap, const Epetra_Map &RangeMap)
	Uses an ML instance to implement the Epetra_Operator interface. More...
	~MultiLevelOperator ()
	Destructor.
int	SetOwnership (bool ownership)
	If set true, the multigrid hierarchy is destroyed when the Operator is destroyed. More...
int	SetUseTranspose (bool UseTrans)
	If set true, transpose of this operator will be applied. More...
int	Apply (const Epetra_MultiVector &, Epetra_MultiVector &) const
	Returns the result of a Operator applied to a Epetra_MultiVector X in Y. More...
int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Operator inverse applied to an Epetra_MultiVector X in Y. More...
double	NormInf () const
	Returns the infinity norm of the global matrix.
const char *	Label () const
	Returns a character string describing the operator.
bool	UseTranspose () const
	Returns the current UseTranspose setting.
bool	HasNormInf () const
	Returns true if the this object can provide an approximate Inf-norm, false otherwise.
const Epetra_Comm &	Comm () const
	Returns a pointer to the Epetra_Comm communicator associated with this operator.
const Epetra_Map &	OperatorDomainMap () const
	Returns the Epetra_Map object associated with the domain of this operator.
const Epetra_Map &	OperatorRangeMap () const
	Returns the Epetra_Map object associated with the range of this operator.
ML *	solver_
	Pointer to the ML_Structure.
const char *	Label_
	Label for this object.

Detailed Description

MultiLevelOperator: An implementation of the Epetra_Operator class.

MultiLevelOperator class implements Epetra_Operator using a pre-constructed ML solver object. This allows ML to be used as preconditioner within an AztecOO solver object.

Constructor & Destructor Documentation

ML_Epetra::MultiLevelOperator::MultiLevelOperator	(	ML *	ml_handle,
		const Epetra_Comm &	myComm,
		const Epetra_Map &	DomainMap,
		const Epetra_Map &	RangeMap
	)

Uses an ML instance to implement the Epetra_Operator interface.

This is designed for using ML as a preconditioner within an AztecOO solver instance.

Parameters

ml_handle	A fully-constructed ML object (In)
myComm	- Epetra communicator (In)
DomainMap	- Epetra domain map (In)
RangeMap	- Epetra range map (In)

Member Function Documentation

int ML_Epetra::MultiLevelOperator::Apply ( const Epetra_MultiVector &  , Epetra_MultiVector &    ) const

inlinevirtual

Returns the result of a Operator applied to a Epetra_MultiVector X in Y.

Parameters

X	(In) - A Epetra_MultiVector of dimension NumVectors to multiply with matrix.
Y	(Out) -A Epetra_MultiVector of dimension NumVectors containing result.

Warning

- This method has no effect and returns -1 as error code.

Implements Epetra_Operator.

int ML_Epetra::MultiLevelOperator::ApplyInverse ( const Epetra_MultiVector &  X, Epetra_MultiVector &  Y  ) const

virtual

Returns the result of a Operator inverse applied to an Epetra_MultiVector X in Y.

Parameters

X	(In) - A Epetra_MultiVector of dimension NumVectors to solve for.
Y	(Out) -A Epetra_MultiVector of dimension NumVectors containing result.

Returns

Integer error code, set to 0 if successful.

Implements Epetra_Operator.

int ML_Epetra::MultiLevelOperator::SetOwnership ( bool  ownership )

inline

If set true, the multigrid hierarchy is destroyed when the Operator is destroyed.

This flag determines the ownership of the multigrid
hierarchy. When set to true, this object owns the multigrid
hierarchy and so it destroys it when freed. Otherwise, it is
assumed that the multigrid hierarchy is owned by another object
and so it is not freed.  By default, the multigrid hierarchy is
not owned by this object.

Parameters

ownership

(In) - If true, this object owns the corresponding multigrid hierarchy.

int ML_Epetra::MultiLevelOperator::SetUseTranspose ( bool  UseTrans )

inlinevirtual

If set true, transpose of this operator will be applied.

This flag allows the transpose of the given operator to be used
implicitly.  Setting this flag affects only the Apply() and
ApplyInverse() methods.  If the implementation of this interface
does not support transpose use, this method should return a
value of -1.

Parameters

UseTranspose

(In) - If true, multiply by the transpose of operator, otherwise just use operator.

Warning

- This method has no effect and returns -1 as error code.

Implements Epetra_Operator.

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The documentation for this class was generated from the following file:

• ml_MultiLevelOperator.h