Block parallel preconditioner. More...

#include <dune/istl/schwarz.hh>

Inheritance diagram for Dune::BlockPreconditioner< X, Y, C, T >:

Public Types
enum	{ category =SolverCategory::overlapping }

typedef X	domain_type
	The domain type of the preconditioner. More...

typedef Y	range_type
	The range type of the preconditioner. More...

typedef X::field_type	field_type
	The field type of the preconditioner. More...

typedef C	communication_type
	The type of the communication object. More...

Public Member Functions
	BlockPreconditioner (T &p, const communication_type &c)
	Constructor. More...

virtual void	pre (X &x, Y &b)
	Prepare the preconditioner. More...

virtual void	apply (X &v, const Y &d)
	Apply the preconditioner. More...

template<bool forward>
void	apply (X &v, const Y &d)
	Apply one step of the preconditioner to the system A(v)=d. More...

virtual void	post (X &x)
	Clean up. More...

Friends
class	Amg::ConstructionTraits< BlockPreconditioner< X, Y, C, T > >

Detailed Description

template<class X, class Y, class C, class T = Preconditioner<X,Y>>
class Dune::BlockPreconditioner< X, Y, C, T >

Block parallel preconditioner.

This is essentially a wrapper that take a sequential preconditoner. In each step the sequential preconditioner is applied and then all owner data points are updates on all other processes.

Member Typedef Documentation

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

typedef C Dune::BlockPreconditioner< X, Y, C, T >::communication_type

The type of the communication object.

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

typedef X Dune::BlockPreconditioner< X, Y, C, T >::domain_type

The domain type of the preconditioner.

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

typedef X::field_type Dune::BlockPreconditioner< X, Y, C, T >::field_type

The field type of the preconditioner.

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

typedef Y Dune::BlockPreconditioner< X, Y, C, T >::range_type

The range type of the preconditioner.

Member Enumeration Documentation

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

anonymous enum

Enumerator
category	The category the precondtioner is part of.

Constructor & Destructor Documentation

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

Dune::BlockPreconditioner< X, Y, C, T >::BlockPreconditioner	(	T &	p,
		const communication_type &	c
	)

inline

Constructor.

constructor gets all parameters to operate the prec.

Parameters

p	The sequential preconditioner.
c	The communication object for syncing overlap and copy data points. (E.~g. OwnerOverlapCommunication )

Member Function Documentation

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

virtual void Dune::BlockPreconditioner< X, Y, C, T >::apply	(	X &	v,
		const Y &	d
	)

inlinevirtual

Apply the preconditioner.

Apply one step of the preconditioner to the system A(v)=d.

Implements Dune::Preconditioner< X, Y >.

template<class X, class Y, class C, class T = Preconditioner<X,Y>>

template<bool forward>

void Dune::BlockPreconditioner< X, Y, C, T >::apply	(	X &	v,
		const Y &	d
	)

inlinevirtual

Apply one step of the preconditioner to the system A(v)=d.

 On entry v=0 and d=b-A(x) (although this might not be 
 computed in that way. On exit v contains the update, i.e
 one step computes \form#37 where \form#38 is the
 approximate inverse of the operator \form#39 characterizing 
 the preconditioner.

Parameters