Ifpack_Krylov: class for smoothing with Krylov solvers in Ifpack. More...

#include <Ifpack_Krylov.h>

Inheritance diagram for Ifpack_Krylov:

Collaboration diagram for Ifpack_Krylov:

Public Member Functions
virtual int	SetUseTranspose (bool UseTranspose_in)


	Ifpack_Krylov (Epetra_Operator *Matrix)

	Ifpack_Krylov (Epetra_RowMatrix *Matrix)
	Ifpack_Krylov constructor with given Epetra_Operator/Epetra_RowMatrix.

virtual	~Ifpack_Krylov ()
	Destructor.


virtual int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Applies the matrix to an Epetra_MultiVector. More...

virtual int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Applies the preconditioner to X, returns the result in Y. More...

virtual double	NormInf () const
	Returns the infinity norm of the global matrix (not implemented)


virtual const char *	Label () const

virtual bool	UseTranspose () const
	Returns the current UseTranspose setting.

virtual bool	HasNormInf () const
	Returns true if the this object can provide an approximate Inf-norm, false otherwise.

virtual const Epetra_Comm &	Comm () const
	Returns a pointer to the Epetra_Comm communicator associated with this operator.

virtual const Epetra_Map &	OperatorDomainMap () const
	Returns the Epetra_Map object associated with the domain of this operator.

virtual const Epetra_Map &	OperatorRangeMap () const
	Returns the Epetra_Map object associated with the range of this operator.

virtual int	Initialize ()
	Computes all it is necessary to initialize the preconditioner.

virtual bool	IsInitialized () const
	Returns true if the preconditioner has been successfully initialized, false otherwise.

virtual bool	IsComputed () const
	Returns `true` if the preconditioner has been successfully computed.

virtual int	Compute ()
	Computes the preconditioners.

virtual const Epetra_RowMatrix &	Matrix () const
	Returns a pointer to the matrix to be preconditioned.

virtual double	Condest (const Ifpack_CondestType CT=Ifpack_Cheap, const int MaxIters=1550, const double Tol=1e-9, Epetra_RowMatrix *Matrix_in=0)
	Computes the condition number estimates and returns the value.

virtual double	Condest () const
	Returns the condition number estimate, or -1.0 if not computed.

virtual int	SetParameters (Teuchos::ParameterList &List)
	Sets all the parameters for the preconditioner.

virtual std::ostream &	Print (std::ostream &os) const
	Prints object to an output stream.


virtual int	NumInitialize () const
	Returns the number of calls to Initialize().

virtual int	NumCompute () const
	Returns the number of calls to Compute().

virtual int	NumApplyInverse () const
	Returns the number of calls to ApplyInverse().

virtual double	InitializeTime () const
	Returns the time spent in Initialize().

virtual double	ComputeTime () const
	Returns the time spent in Compute().

virtual double	ApplyInverseTime () const
	Returns the time spent in ApplyInverse().

virtual double	InitializeFlops () const
	Returns the number of flops in the initialization phase.

virtual double	ComputeFlops () const
	Returns the number of flops in the computation phase.

virtual double	ApplyInverseFlops () const
	Returns the number of flops for the application of the preconditioner.

Detailed Description

Ifpack_Krylov: class for smoothing with Krylov solvers in Ifpack.

Definition at line 81 of file Ifpack_Krylov.h.

Member Function Documentation

int Ifpack_Krylov::Apply	(	const Epetra_MultiVector &	X,
		Epetra_MultiVector &	Y
	)		const

inlinevirtual

Applies the matrix to an Epetra_MultiVector.

Parameters

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

Returns: Integer error code, set to 0 if successful.

Implements Epetra_Operator.

Definition at line 178 of file Ifpack_Krylov.cpp.

References IsComputed(), and UseTranspose().

int Ifpack_Krylov::ApplyInverse	(	const Epetra_MultiVector &	X,
		Epetra_MultiVector &	Y
	)		const

virtual

Applies the preconditioner to X, returns the result in Y.

Parameters

X	- (In) A Epetra_MultiVector of dimension NumVectors to be preconditioned.
Y	- (InOut) A Epetra_MultiVector of dimension NumVectors containing result.

Returns: Integer error code, set to 0 if successful.

Warning: This routine is NOT AztecOO complaint.

Implements Ifpack_Preconditioner.

Definition at line 380 of file Ifpack_Krylov.cpp.

References IsComputed().

virtual int Ifpack_Krylov::SetUseTranspose ( bool UseTranspose_in )

inlinevirtual

This flag can be used to apply the preconditioner to the transpose of the input operator.

Returns: Integer error code, set to 0 if successful. Set to -1 if this implementation does not support transpose.

Implements Epetra_Operator.

Definition at line 107 of file Ifpack_Krylov.h.

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

Public Member Functions

Detailed Description

Member Function Documentation