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

Nonoverlapping parallel BiCGSTAB solver preconditioned by block SSOR. More...

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

Public Member Functions
	ISTLBackend_NOVLP_BCGS_SSORk (const GO &grid_operator, unsigned maxiter_=5000, int steps_=5, int verbose_=1)
	make a linear solver object More...
Vector::ElementType	norm (const Vector &v) const
	Compute global norm of a vector. More...
void	apply (M &A, V &z, W &r, typename V::ElementType reduction)
	Solve the given linear system. More...
const Dune::PDELab::LinearSolverResult< double > &	result () const
	Return access to result data.

Detailed Description

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

Nonoverlapping parallel BiCGSTAB solver preconditioned by block SSOR.

Template Parameters

GO	The type of the grid operator used for the spatial discretization (or the fakeGOTraits class for the old grid operator space). It is used to adjust the discretization matrix and extract the trial grid function space.

The solver uses a NonoverlappingBlockPreconditioner with underlying sequential SSOR preconditioner. The crucial step is to add up the matrix entries corresponding to the border vertices on each process. This is achieved by performing a VertexExchanger::sumEntries(Matrix&) before constructing the sequential SSOR.

Constructor & Destructor Documentation

ISTLBackend_NOVLP_BCGS_SSORk()

template<class GO >

Dune::PDELab::ISTLBackend_NOVLP_BCGS_SSORk< GO >::ISTLBackend_NOVLP_BCGS_SSORk ( const GO &  grid_operator, unsigned  maxiter_ = 5000, int  steps_ = 5, int  verbose_ = 1  )

inlineexplicit

make a linear solver object

Parameters

[in]	gfs_	a grid function space
[in]	maxiter_	maximum number of iterations to do
[in]	steps_	number of SSOR steps to apply as inner iteration
[in]	verbose_	print messages if true

Member Function Documentation

apply()

void Dune::PDELab::ISTLBackend_NOVLP_BASE_PREC< GO, Dune::SeqSSOR , Dune::BiCGSTABSolver >::apply ( M &  A, V &  z, W &  r, typename V::ElementType  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()

Vector::ElementType Dune::PDELab::ISTLBackend_NOVLP_BASE_PREC< GO, Dune::SeqSSOR , Dune::BiCGSTABSolver >::norm ( const Vector &  v ) const

inlineinherited

Compute global norm of a vector.

Parameters

[in]

v

the given vector

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

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