Poisson2dOperator: A sample implementation of the Epetra_Operator class. More...

#include <Poisson2dOperator.h>

Inheritance diagram for Poisson2dOperator:

Public Attributes
int	nx_

int	ny_

int	myny_

bool	useTranspose_

const Epetra_Comm &	comm_

Epetra_Map *	map_

int	numImports_

int *	importIDs_

Epetra_Map *	importMap_

Epetra_Import *	importer_

Epetra_MultiVector *	importX_

const char *	Label_

long long *	importIDs_

	Poisson2dOperator (int nx, int ny, const Epetra_Comm &comm)
	Builds a 2 dimensional Poisson operator for a nx by ny grid, assuming zero Dirichlet BCs. More...

	~Poisson2dOperator ()
	Destructor. More...

int	SetUseTranspose (bool useTranspose)
	If `useTranspose` = true, apply the transpose from now on. More...

int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Poisson2dOperator applied to a Epetra_MultiVector X in Y. More...

int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Poisson2dOperator inverse applied to an Epetra_MultiVector X in Y. More...

double	NormInf () const
	Returns the infinity norm of the global matrix. More...

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

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

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

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

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

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

Epetra_CrsMatrix *	GeneratePrecMatrix () const
	Generate a tridiagonal approximation to the 5-point Poisson as an Epetra_CrsMatrix. More...

	Poisson2dOperator (int nx, int ny, const Epetra_Comm &comm)
	Builds a 2 dimensional Poisson operator for a nx by ny grid, assuming zero Dirichlet BCs. More...

	~Poisson2dOperator ()
	Destructor. More...

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 Poisson2dOperator applied to a Epetra_MultiVector X in Y. More...

int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Poisson2dOperator inverse applied to an Epetra_MultiVector X in Y. More...

double	NormInf () const
	Returns the infinity norm of the global matrix. More...

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

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

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

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

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

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

Epetra_CrsMatrix *	GeneratePrecMatrix () const
	Generate a tridiagonal approximation to the 5-point Poisson as an Epetra_CrsMatrix. More...

Additional Inherited Members

Detailed Description

Poisson2dOperator: A sample implementation of the Epetra_Operator class.

The Poisson2dOperator class is a class that implements Epetra_Operator for a 5-point Poisson stencil operator.

Definition at line 65 of file Poisson2dOperator.h.

Constructor & Destructor Documentation

Poisson2dOperator::Poisson2dOperator	(	int	nx,
		int	ny,
		const Epetra_Comm &	comm
	)

Builds a 2 dimensional Poisson operator for a nx by ny grid, assuming zero Dirichlet BCs.

Build a 2 D Poisson operator. Split the y-dimension across the processor space.

Parameters

In	nx - Number of gridpoints in the x direction.
In	ny - Number of gridpoints in the y direction.

Definition at line 52 of file Poisson2dOperator.cpp.

Poisson2dOperator::~Poisson2dOperator ( )

Destructor.

Definition at line 107 of file Poisson2dOperator.cpp.

Poisson2dOperator::Poisson2dOperator	(	int	nx,
		int	ny,
		const Epetra_Comm &	comm
	)

Builds a 2 dimensional Poisson operator for a nx by ny grid, assuming zero Dirichlet BCs.

Build a 2 D Poisson operator. Split the y-dimension across the processor space.

Parameters

In	nx - Number of gridpoints in the x direction.
In	ny - Number of gridpoints in the y direction.

Poisson2dOperator::~Poisson2dOperator ( )

Destructor.

Member Function Documentation

int Poisson2dOperator::SetUseTranspose ( bool useTranspose )

inlinevirtual

If useTranspose = true, apply the transpose from now on.

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, this operator from now on switches to use its transpose. Otherwise, this operator from now on does not use its transpose.

Returns: -1 if this class does not implement the transpose, 0 if successful.

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

Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation