Reference documentation for deal.II version Git 9bc2b85 2016-02-14 09:44:09 -0500
Public Member Functions | List of all members
PreconditionJacobi< MatrixType > Class Template Reference

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

Inheritance diagram for PreconditionJacobi< MatrixType >:
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Public Member Functions

template<class VectorType >
void vmult (VectorType &, const VectorType &) const
 
template<class VectorType >
void Tvmult (VectorType &, const VectorType &) const
 
template<class VectorType >
void step (VectorType &x, const VectorType &rhs) const
 
template<class VectorType >
void Tstep (VectorType &x, const VectorType &rhs) const
 
- Public Member Functions inherited from PreconditionRelaxation< MatrixType >
void initialize (const MatrixType &A, const AdditionalData &parameters=AdditionalData())
 
void clear ()
 
size_type m () const
 
size_type n () const
 
- Public Member Functions inherited from Subscriptor
 Subscriptor ()
 
 Subscriptor (const Subscriptor &)
 
virtual ~Subscriptor ()
 
Subscriptoroperator= (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."<< "\n\n"<< "(Additional information: "<< arg3<< ")\n\n"<< "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)
 

Additional Inherited Members

- Public Types inherited from PreconditionRelaxation< MatrixType >
typedef MatrixType::size_type size_type
 
- Protected Attributes inherited from PreconditionRelaxation< MatrixType >
SmartPointer< const MatrixType, PreconditionRelaxation< MatrixType > > A
 
double relaxation
 

Detailed Description

template<typename MatrixType = SparseMatrix<double>>
class PreconditionJacobi< MatrixType >

Jacobi preconditioner using matrix built-in function. The MatrixType class used is required to have a function precondition_Jacobi(VectorType&, const VectorType&, double). This class satisfies the relaxation concept.

// Declare related objects
SolverCG<> solver(...);
//...initialize and build A
// Define and initialize preconditioner
precondition.initialize (A, .6);
solver.solve (A, x, b, precondition);
Author
Guido Kanschat, 2000

Definition at line 475 of file precondition.h.

Member Function Documentation

template<typename MatrixType = SparseMatrix<double>>
template<class VectorType >
void PreconditionJacobi< MatrixType >::vmult ( VectorType &  ,
const VectorType &   
) const

Apply preconditioner.

template<typename MatrixType = SparseMatrix<double>>
template<class VectorType >
void PreconditionJacobi< MatrixType >::Tvmult ( VectorType &  ,
const VectorType &   
) const

Apply transpose preconditioner. Since this is a symmetric preconditioner, this function is the same as vmult().

template<typename MatrixType = SparseMatrix<double>>
template<class VectorType >
void PreconditionJacobi< MatrixType >::step ( VectorType &  x,
const VectorType &  rhs 
) const

Perform one step of the preconditioned Richardson iteration.

template<typename MatrixType = SparseMatrix<double>>
template<class VectorType >
void PreconditionJacobi< MatrixType >::Tstep ( VectorType &  x,
const VectorType &  rhs 
) const

Perform one transposed step of the preconditioned Richardson iteration.


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