Dune::PDELab::ISTLBackend_SEQ_CG_AMG_SSOR< GO > Class Template Reference

Sequential conjugate gradient solver preconditioned with AMG smoothed by SSOR. More...

#include <dune/pdelab/backend/istl/seqistlsolverbackend.hh>

Public Member Functions
	ISTLBackend_SEQ_CG_AMG_SSOR (unsigned maxiter_=5000, int verbose_=1, bool reuse_=false, bool usesuperlu_=true)
	Constructor. More...
void	setparams (Parameters params_)
	set AMG parameters More...
void	setReuse (bool reuse_)
	Set whether the AMG should be reused again during call to apply().
bool	getReuse () const
	Return whether the AMG is reused during call to apply()
V::ElementType	norm (const V &v) const
	compute global norm of a vector More...
void	apply (M &A, V &z, V &r, typename Dune::template FieldTraits< typename V::ElementType >::real_type reduction)
	solve the given linear system More...
const ISTLAMGStatistics &	statistics () const
	Get statistics of the AMG solver (no of levels, timings). More...
const Dune::PDELab::LinearSolverResult< double > &	result () const
	Return access to result data.

Detailed Description

template<class GO>
class Dune::PDELab::ISTLBackend_SEQ_CG_AMG_SSOR< GO >

Sequential conjugate gradient solver preconditioned with AMG smoothed by SSOR.

Template Parameters

GO	The type of the grid operator (or the fakeGOTraits class for the old grid operator space).

Examples

recipe-geometry-grid.cc, and recipe-linear-system-solution-pdelab.cc.

Constructor & Destructor Documentation

ISTLBackend_SEQ_CG_AMG_SSOR()

template<class GO >

Dune::PDELab::ISTLBackend_SEQ_CG_AMG_SSOR< GO >::ISTLBackend_SEQ_CG_AMG_SSOR ( unsigned  maxiter_ = 5000, int  verbose_ = 1, bool  reuse_ = false, bool  usesuperlu_ = true  )

inline

Constructor.

Parameters

maxiter_	The maximum number of iterations allowed.
verbose_	The verbosity level to use.
reuse_	Set true, if the Matrix to be used is always identical (AMG aggregation is then only performed once).
usesuperlu_	Set false, to suppress the no SuperLU warning

Member Function Documentation

apply()

template<class GO , template< class, class, class, int > class Preconditioner, template< class > class Solver, bool skipBlocksizeCheck = false>

void Dune::PDELab::ISTLBackend_SEQ_AMG< GO, Preconditioner, Solver, skipBlocksizeCheck >::apply ( M &  A, V &  z, V &  r, typename Dune::template FieldTraits< typename V::ElementType >::real_type  reduction  )

inlineinherited

solve the given linear system

Parameters

[in]	A	the given matrix
[out]	z	the solution vector to be computed
[in]	r	right hand side
[in]	reduction	to be achieved

norm()

template<class GO , template< class, class, class, int > class Preconditioner, template< class > class Solver, bool skipBlocksizeCheck = false>

V::ElementType Dune::PDELab::ISTLBackend_SEQ_AMG< GO, Preconditioner, Solver, skipBlocksizeCheck >::norm ( const V &  v ) const

inlineinherited

compute global norm of a vector

Parameters

[in]

v

the given vector

setparams()

template<class GO , template< class, class, class, int > class Preconditioner, template< class > class Solver, bool skipBlocksizeCheck = false>

void Dune::PDELab::ISTLBackend_SEQ_AMG< GO, Preconditioner, Solver, skipBlocksizeCheck >::setparams ( Parameters  params_ )

inlineinherited

set AMG parameters

Parameters

[in]

params_

a parameter object of Type Dune::Amg::Parameters

statistics()

template<class GO , template< class, class, class, int > class Preconditioner, template< class > class Solver, bool skipBlocksizeCheck = false>

const ISTLAMGStatistics& Dune::PDELab::ISTLBackend_SEQ_AMG< GO, Preconditioner, Solver, skipBlocksizeCheck >::statistics ( ) const

inlineinherited

Get statistics of the AMG solver (no of levels, timings).

Returns

statistis of the AMG solver.

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

• dune/pdelab/backend/istl/seqistlsolverbackend.hh