MGSmootherBlock< MatrixType, RelaxationType, number > Class Template Reference

#include <deal.II/multigrid/mg_block_smoother.h>

Inheritance diagram for MGSmootherBlock< MatrixType, RelaxationType, number >:

Public Member Functions
	MGSmootherBlock (VectorMemory< BlockVector< number > > &mem, const unsigned int steps=1, const bool variable=false, const bool symmetric=false, const bool transpose=false, const bool reverse=false)
template<class MGMatrixType , class MGRelaxationType >
void	initialize (const MGMatrixType &matrices, const MGRelaxationType &smoothers)
void	clear ()
void	set_steps (const unsigned int)
void	set_variable (const bool)
void	set_symmetric (const bool)
void	set_transpose (const bool)
void	set_reverse (const bool)
virtual void	smooth (const unsigned int level, BlockVector< number > &u, const BlockVector< number > &rhs) const
Public Member Functions inherited from MGSmootherBase< BlockVector< number > >
virtual	~MGSmootherBase ()
Public Member Functions inherited from Subscriptor
	Subscriptor ()
	Subscriptor (const Subscriptor &)
virtual	~Subscriptor ()
Subscriptor &	operator= (const Subscriptor &)
void	subscribe (const char *identifier=0) const
void	unsubscribe (const char *identifier=0) const
unsigned int	n_subscriptions () const
void	list_subscribers () const
	DeclException3 (ExcInUse, int, char *, std::string &,<< "Object of class "<< arg2<< " is still used by "<< arg1<< " other objects."<< "\"<< "(Additional information: "<< arg3<< ")\"<< "See the entry in the Frequently Asked Questions of "<< "deal.II (linked to from http://www.dealii.org/) for "<< "a lot more information on what this error means and "<< "how to fix programs in which it happens.")
	DeclException2 (ExcNoSubscriber, char *, char *,<< "No subscriber with identifier <"<< arg2<< "> subscribes to this object of class "<< arg1<< ". Consequently, it cannot be unsubscribed.")
template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

Private Attributes
MGLevelObject< PointerMatrix< MatrixType, BlockVector< number > > >	matrices
MGLevelObject< PointerMatrix< RelaxationType, BlockVector< number > > >	smoothers
unsigned int	steps
bool	variable
bool	symmetric
bool	reverse
VectorMemory< BlockVector< number > > &	mem

Detailed Description

template<typename MatrixType, class RelaxationType, typename number>
class MGSmootherBlock< MatrixType, RelaxationType, number >

General smoother class for block vectors. This class gives complete freedom to the choice of a block smoother by being initialized with a matrix and a smoother object. Therefore, the smoother object for each level must be constructed by hand.

Author

Guido Kanschat, 2005

Definition at line 47 of file mg_block_smoother.h.

Constructor & Destructor Documentation

MGSmootherBlock()

template<typename MatrixType , class RelaxationType , typename number >

MGSmootherBlock< MatrixType, RelaxationType, number >::MGSmootherBlock	(	VectorMemory< BlockVector< number > > &	mem,
		const unsigned int	steps = 1,
		const bool	variable = false,
		const bool	symmetric = false,
		const bool	transpose = false,
		const bool	reverse = false
	)

Constructor. Sets memory and smoothing parameters.

Member Function Documentation

initialize()

template<typename MatrixType , class RelaxationType , typename number >

template<class MGMatrixType , class MGRelaxationType >

void MGSmootherBlock< MatrixType, RelaxationType, number >::initialize	(	const MGMatrixType &	matrices,
		const MGRelaxationType &	smoothers
	)

Initialize for matrices. The parameter matrices can be any object having functions get_minlevel() and get_maxlevel() as well as an operator[] returning a reference to MatrixType.

The same convention is used for the parameter smoothers, such that operator[] returns the object doing the block-smoothing on a single level.

This function stores pointers to the level matrices and smoothing operator for each level.

clear()

template<typename MatrixType , class RelaxationType , typename number >

void MGSmootherBlock< MatrixType, RelaxationType, number >::clear ( )

virtual

Empty all vectors.

Implements MGSmootherBase< BlockVector< number > >.

set_steps()

template<typename MatrixType , class RelaxationType , typename number >

void MGSmootherBlock< MatrixType, RelaxationType, number >::set_steps

(

const unsigned

int

)

Modify the number of smoothing steps on finest level.

set_variable()

template<typename MatrixType , class RelaxationType , typename number >

void MGSmootherBlock< MatrixType, RelaxationType, number >::set_variable

(

const bool

)

Switch on/off variable smoothing.

set_symmetric()

template<typename MatrixType , class RelaxationType , typename number >

void MGSmootherBlock< MatrixType, RelaxationType, number >::set_symmetric

(

const bool

)

Switch on/off symmetric smoothing.

set_transpose()

template<typename MatrixType , class RelaxationType , typename number >

void MGSmootherBlock< MatrixType, RelaxationType, number >::set_transpose

(

const bool

)

Switch on/off transposed. This is mutually exclusive with reverse().

set_reverse()

template<typename MatrixType , class RelaxationType , typename number >

void MGSmootherBlock< MatrixType, RelaxationType, number >::set_reverse

(

const bool

)

Switch on/off reversed. This is mutually exclusive with transpose().

smooth()

template<typename MatrixType , class RelaxationType , typename number >

virtual void MGSmootherBlock< MatrixType, RelaxationType, number >::smooth ( const unsigned int  level, BlockVector< number > &  u, const BlockVector< number > &  rhs  ) const

virtual

Implementation of the interface for Multigrid. This function does nothing, which by comparison with the definition of this function means that the the smoothing operator equals the null operator.

Implements MGSmootherBase< BlockVector< number > >.

Member Data Documentation

matrices

template<typename MatrixType , class RelaxationType , typename number >

MGLevelObject<PointerMatrix<MatrixType, BlockVector<number> > > MGSmootherBlock< MatrixType, RelaxationType, number >::matrices

private

Pointer to the matrices.

Definition at line 120 of file mg_block_smoother.h.

smoothers

template<typename MatrixType , class RelaxationType , typename number >

MGLevelObject<PointerMatrix<RelaxationType, BlockVector<number> > > MGSmootherBlock< MatrixType, RelaxationType, number >::smoothers

private

Pointer to the matrices.

Definition at line 125 of file mg_block_smoother.h.

steps

template<typename MatrixType , class RelaxationType , typename number >

unsigned int MGSmootherBlock< MatrixType, RelaxationType, number >::steps

private

Number of smoothing steps.

Definition at line 130 of file mg_block_smoother.h.

variable

template<typename MatrixType , class RelaxationType , typename number >

bool MGSmootherBlock< MatrixType, RelaxationType, number >::variable

private

Variable smoothing?

Definition at line 135 of file mg_block_smoother.h.

symmetric

template<typename MatrixType , class RelaxationType , typename number >

bool MGSmootherBlock< MatrixType, RelaxationType, number >::symmetric

private

Symmetric smoothing?

Definition at line 140 of file mg_block_smoother.h.

reverse

template<typename MatrixType , class RelaxationType , typename number >

bool MGSmootherBlock< MatrixType, RelaxationType, number >::reverse

private

Reverse?

Definition at line 150 of file mg_block_smoother.h.

mem

template<typename MatrixType , class RelaxationType , typename number >

VectorMemory<BlockVector<number> >& MGSmootherBlock< MatrixType, RelaxationType, number >::mem

private

Memory for auxiliary vectors.

Definition at line 155 of file mg_block_smoother.h.

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

• deal.II/multigrid/mg_block_smoother.h