PreconditionRichardson Class Reference

#include <deal.II/lac/precondition.h>

Inheritance diagram for PreconditionRichardson:

Classes
class	AdditionalData

Public Types
using	size_type = types::global_dof_index

Public Member Functions
	PreconditionRichardson ()
void	initialize (const AdditionalData &parameters)
template<typename MatrixType >
void	initialize (const MatrixType &matrix, const AdditionalData &parameters)
template<class VectorType >
void	vmult (VectorType &, const VectorType &) const
template<class VectorType >
void	Tvmult (VectorType &, const VectorType &) const
template<class VectorType >
void	vmult_add (VectorType &, const VectorType &) const
template<class VectorType >
void	Tvmult_add (VectorType &, const VectorType &) const
void	clear ()
size_type	m () const
size_type	n () const

Private Attributes
double	relaxation
size_type	n_rows
size_type	n_columns

Subscriptor functionality
Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class.
std::atomic< unsigned int >	counter
std::map< std::string, unsigned int >	counter_map
std::vector< std::atomic< bool > * >	validity_pointers
const std::type_info *	object_info
void	subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const
void	unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const
unsigned int	n_subscriptions () const
template<typename StreamType >
void	list_subscribers (StreamType &stream) const
void	list_subscribers () const
template<class Archive >
void	serialize (Archive &ar, const unsigned int version)
using	map_value_type = decltype(counter_map)::value_type
using	map_iterator = decltype(counter_map)::iterator
static std::mutex	mutex
static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)
static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)
void	check_no_subscribers () const noexcept

Detailed Description

Preconditioning with Richardson's method. This preconditioner just scales the vector with a constant relaxation factor provided by the AdditionalData object.

In Krylov-space methods, this preconditioner should not have any effect. Using SolverRichardson, the two relaxation parameters will be just multiplied. Still, this class is useful in multigrid smoother objects (MGSmootherRelaxation).

Definition at line 195 of file precondition.h.

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

• include/deal.II/lac/precondition.h