Ifpack_CrsIlut: ILUT preconditioner of a given Epetra_RowMatrix. More...

#include <Ifpack_CrsIlut.h>

Inheritance diagram for Ifpack_CrsIlut:

Collaboration diagram for Ifpack_CrsIlut:

Public Member Functions

	Ifpack_CrsIlut (const Ifpack_OverlapGraph *OverlapGraph, double DropTol=1.0E-4, double FillTol=1.0)
	Constructor using Ifpack_OverlapGraph. More...

	Ifpack_CrsIlut (const Epetra_RowMatrix *UserMatrix, double DropTol=1.0E-4, double FillTol=1.0)
	Constructor using Epetra_RowMatrix. More...

	Ifpack_CrsIlut (const Ifpack_CrsIlut &Source)
	Copy constructor.

virtual	~Ifpack_CrsIlut ()
	Ifpack_CrsIlut Destructor.


int	SetDropTol (double DropTol)
	Set Drop tolerance value as defined by the ILUT algorithm.

int	SetFillTol (double FillTol)
	Set fill tolerance value as defined by the ILUT algorithm.

int	SetParameters (const Teuchos::ParameterList &parameterlist, bool cerr_warning_if_unused=false)
	Set parameters using a Teuchos::ParameterList object.


double	DropTol () const
	Set Drop tolerance value as defined by the ILUT algorithm.

double	FillTol () const
	Set fill tolerance value as defined by the ILUT algorithm.

Public Member Functions inherited from Ifpack_OverlapFactorObject
	Ifpack_OverlapFactorObject (const Ifpack_OverlapGraph *OverlapGraph)
	Constructor using Ifpack_OverlapGraph. More...

	Ifpack_OverlapFactorObject (const Epetra_RowMatrix *UserMatrix)
	Constructor using Epetra_RowMatrix. More...

	Ifpack_OverlapFactorObject (const Ifpack_OverlapFactorObject &Source)
	Copy constructor.

virtual	~Ifpack_OverlapFactorObject ()
	Ifpack_OverlapFactorObject Destructor.

virtual int	InitValues (const Epetra_RowMatrix *UserMatrix)
	Initialize values from user matrix A, can be called repeatedly as matrix values change. More...

virtual int	Factor ()
	Compute factors. More...

bool	Allocated () const
	If storage has been allocated, this query returns true, otherwise it returns false.

bool	ValuesInitialized () const
	If values have been initialized, this query returns true, otherwise it returns false.

bool	Factored () const
	If factor is completed, this query returns true, otherwise it returns false.

Public Member Functions inherited from Ifpack_OverlapSolveObject
	Ifpack_OverlapSolveObject (char *Label, const Epetra_Comm &Comm)
	Constructor.

	Ifpack_OverlapSolveObject (const Ifpack_OverlapSolveObject &Source)
	Copy constructor.

virtual	~Ifpack_OverlapSolveObject ()
	Ifpack_OverlapSolveObject Destructor.

void	SetOverlapMode (Epetra_CombineMode OverlapMode)
	Generate Ifpack_OverlapGraph object using current settings.

int	SetLowerOperator (Epetra_CrsMatrix *L, bool UseLTrans)
	Define the operator to be used for the lower triangle.

int	SetDiagonal (Epetra_Vector *D, bool UseDInv)
	Define the vector to be used for the diagonal.

int	SetUpperOperator (Epetra_CrsMatrix *U, bool UseUTrans)
	Define the operator to be used for the upper triangle.

int	Solve (bool Trans, const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Ifpack_CrsIlut forward/back solve on a Epetra_MultiVector X in Y (works for Epetra_Vectors also). More...

int	Multiply (bool Trans, const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of multiplying U, D and L in that order on an Epetra_MultiVector X in Y. More...

int	Condest (bool Trans, double &ConditionNumberEstimate) const
	Returns the maximum over all the condition number estimate for each local ILU set of factors. More...

Epetra_CombineMode	OverlapMode () const
	Returns the overlap mode used to combine terms that are redundantly computed. More...

int	NumGlobalNonzeros () const
	Returns the number of nonzero entries in the global graph.

int	NumMyNonzeros () const
	Returns the number of nonzero entries in the local graph.

const Epetra_CrsMatrix &	L () const
	Returns the address of the L factor associated with this factored matrix.

const Epetra_Vector &	D () const
	Returns the address of the D factor associated with this factored matrix.

const Epetra_CrsMatrix &	U () const
	Returns the address of the L factor associated with this factored matrix.

const char *	Label () const
	Returns a character string describing the operator.

int	SetUseTranspose (bool UseTranspose)
	If set true, transpose of this operator will be applied. More...

int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Epetra_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 Epetra_Operator inverse applied to an Epetra_MultiVector X in Y. More...

double	NormInf () const
	Returns 0.0 because this class cannot compute Inf-norm.

bool	HasNormInf () const
	Returns false because this class cannot compute an Inf-norm.

bool	UseTranspose () const
	Returns the current UseTranspose setting.

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.

const Epetra_Comm &	Comm () const
	Returns the Epetra_BlockMap object associated with the range of this matrix operator.

Protected Member Functions

int	ProcessOverlapMatrix (const Epetra_RowMatrix &A)
	Processes the overlapped user matrix for computing the ILUT preconditioner.

int	DerivedFactor ()
	Compute ILUT factors L and U: WARNING: THIS ROUTINE IS NOT USER CALLABLE, CALL Factor().

Protected Member Functions inherited from Ifpack_OverlapFactorObject
void	SetAllocated (bool Flag)

void	SetFactored (bool Flag)

void	SetValuesInitialized (bool Flag)

Protected Member Functions inherited from Ifpack_OverlapSolveObject
virtual int	SetupXY (bool Trans, const Epetra_MultiVector &Xin, const Epetra_MultiVector &Yin, Epetra_MultiVector &Xout, Epetra_MultiVector &Yout) const =0

Additional Inherited Members
Protected Attributes inherited from Ifpack_OverlapFactorObject
bool	Factored_

bool	Allocated_

bool	ValuesInitialized_

Ifpack_OverlapGraph *	OverlapGraph_

Epetra_RowMatrix *	UserMatrix_

Detailed Description

Ifpack_CrsIlut: ILUT preconditioner of a given Epetra_RowMatrix.

Definition at line 70 of file Ifpack_CrsIlut.h.

Constructor & Destructor Documentation

Ifpack_CrsIlut::Ifpack_CrsIlut	(	const Ifpack_OverlapGraph *	OverlapGraph,
		double	DropTol = `1.0E-4`,
		double	FillTol = `1.0`
	)

Constructor using Ifpack_OverlapGraph.

Creates an object from the overlap graph.

Parameters

OverlapGraph	(In) - Graph describing the graph that should be used for the factors.
DropTol	(In/Default) - Drop tolerance used by ILUT algorithm.
FillTol	(In/Default) - Fill tolerance used by ILUT algorithm.

Definition at line 57 of file Ifpack_CrsIlut.cpp.

Ifpack_CrsIlut::Ifpack_CrsIlut	(	const Epetra_RowMatrix *	UserMatrix,
		double	DropTol = `1.0E-4`,
		double	FillTol = `1.0`
	)

Constructor using Epetra_RowMatrix.

Creates an Ifpack_Graph object from the user graph implicitly defined by the Epetra_RowMatrix interface.

Parameters

RowMatrix	(In) - An object that has implemented the Epetra_RowMatrix interface.
DropTol	(In/Default) - Drop tolerance used by ILUT algorithm.
FillTol	(In/Default) - Fill tolerance used by ILUT algorithm.

Definition at line 68 of file Ifpack_CrsIlut.cpp.

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

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation