PreconditionMG< dim, VectorType, TRANSFER > Class Template Reference

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

Inheritance diagram for PreconditionMG< dim, VectorType, TRANSFER >:

Public Member Functions
	PreconditionMG (const DoFHandler< dim > &dof_handler, Multigrid< VectorType > &mg, const TRANSFER &transfer)
bool	empty () const
template<class OtherVectorType >
void	vmult (OtherVectorType &dst, const OtherVectorType &src) const
template<class OtherVectorType >
void	vmult_add (OtherVectorType &dst, const OtherVectorType &src) const
template<class OtherVectorType >
void	Tvmult (OtherVectorType &dst, const OtherVectorType &src) const
template<class OtherVectorType >
void	Tvmult_add (OtherVectorType &dst, const OtherVectorType &src) const
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
SmartPointer< const DoFHandler< dim >, PreconditionMG< dim, VectorType, TRANSFER > >	dof_handler
SmartPointer< Multigrid< VectorType >, PreconditionMG< dim, VectorType, TRANSFER > >	multigrid
SmartPointer< const TRANSFER, PreconditionMG< dim, VectorType, TRANSFER > >	transfer

Detailed Description

template<int dim, typename VectorType, class TRANSFER>
class PreconditionMG< dim, VectorType, TRANSFER >

Multi-level preconditioner. Here, we collect all information needed for multi-level preconditioning and provide the standard interface for LAC iterative methods.

Furthermore, it needs functions void copy_to_mg(const VectorType&) to store src in the right hand side of the multi-level method and void copy_from_mg(VectorType&) to store the result of the v-cycle in dst.

Author

Guido Kanschat, 1999, 2000, 2001, 2002

Definition at line 350 of file multigrid.h.

Constructor & Destructor Documentation

PreconditionMG()

template<int dim, typename VectorType, class TRANSFER>

PreconditionMG< dim, VectorType, TRANSFER >::PreconditionMG	(	const DoFHandler< dim > &	dof_handler,
		Multigrid< VectorType > &	mg,
		const TRANSFER &	transfer
	)

Constructor. Arguments are the multigrid object, pre-smoother, post- smoother and coarse grid solver.

Member Function Documentation

empty()

template<int dim, typename VectorType, class TRANSFER>

bool PreconditionMG< dim, VectorType, TRANSFER >::empty

(

)

const

Dummy function needed by other classes.

vmult()

template<int dim, typename VectorType, class TRANSFER>

template<class OtherVectorType >

void PreconditionMG< dim, VectorType, TRANSFER >::vmult	(	OtherVectorType &	dst,
		const OtherVectorType &	src
	)		const

Preconditioning operator. Calls the vcycle function of the MG object passed to the constructor.

This is the operator used by LAC iterative solvers.

vmult_add()

template<int dim, typename VectorType, class TRANSFER>

template<class OtherVectorType >

void PreconditionMG< dim, VectorType, TRANSFER >::vmult_add	(	OtherVectorType &	dst,
		const OtherVectorType &	src
	)		const

Preconditioning operator. Calls the vcycle function of the MG object passed to the constructor.

Tvmult()

template<int dim, typename VectorType, class TRANSFER>

template<class OtherVectorType >

void PreconditionMG< dim, VectorType, TRANSFER >::Tvmult	(	OtherVectorType &	dst,
		const OtherVectorType &	src
	)		const

Tranposed preconditioning operator.

Not implemented, but the definition may be needed.

Tvmult_add()

template<int dim, typename VectorType, class TRANSFER>

template<class OtherVectorType >

void PreconditionMG< dim, VectorType, TRANSFER >::Tvmult_add	(	OtherVectorType &	dst,
		const OtherVectorType &	src
	)		const

Tranposed preconditioning operator.

Not implemented, but the definition may be needed.

Member Data Documentation

dof_handler

template<int dim, typename VectorType, class TRANSFER>

SmartPointer<const DoFHandler<dim>,PreconditionMG<dim,VectorType,TRANSFER> > PreconditionMG< dim, VectorType, TRANSFER >::dof_handler

private

Associated DoFHandler.

Definition at line 406 of file multigrid.h.

multigrid

template<int dim, typename VectorType, class TRANSFER>

SmartPointer<Multigrid<VectorType>,PreconditionMG<dim,VectorType,TRANSFER> > PreconditionMG< dim, VectorType, TRANSFER >::multigrid

private

The multigrid object.

Definition at line 411 of file multigrid.h.

transfer

template<int dim, typename VectorType, class TRANSFER>

SmartPointer<const TRANSFER,PreconditionMG<dim,VectorType,TRANSFER> > PreconditionMG< dim, VectorType, TRANSFER >::transfer

private

Object for grid tranfer.

Definition at line 416 of file multigrid.h.

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

• deal.II/multigrid/multigrid.h