dune-istl  2.3.1
Classes | Public Types | Public Member Functions | Friends | List of all members
Dune::Amg::AMG< M, X, S, PI, A > Class Template Reference

Parallel algebraic multigrid based on agglomeration. More...

#include <dune/istl/paamg/amg.hh>

Inheritance diagram for Dune::Amg::AMG< M, X, S, PI, A >:
Dune::Preconditioner< X, X >

Classes

struct  LevelContext
 A struct that holds the context of the current level.

Public Types

enum  { category = S::category }
typedef M Operator
 The matrix operator type.
typedef PI ParallelInformation
 The type of the parallel information. Either OwnerOverlapCommunication or another type describing the parallel data distribution and providing communication methods.
typedef MatrixHierarchy< M,
ParallelInformation, A
OperatorHierarchy
 The operator hierarchy type.
typedef
OperatorHierarchy::ParallelInformationHierarchy 
ParallelInformationHierarchy
 The parallal data distribution hierarchy type.
typedef X Domain
 The domain type.
typedef X Range
 The range type.
typedef InverseOperator< X, X > CoarseSolver
 the type of the coarse solver.
typedef S Smoother
 The type of the smoother.
typedef SmootherTraits
< Smoother >::Arguments 
SmootherArgs
 The argument type for the construction of the smoother.
typedef X domain_type
 The domain type of the preconditioner.
typedef X range_type
 The range type of the preconditioner.
typedef X::field_type field_type
 The field type of the preconditioner.

Public Member Functions

 AMG (const OperatorHierarchy &matrices, CoarseSolver &coarseSolver, const SmootherArgs &smootherArgs, std::size_t gamma, std::size_t preSmoothingSteps, std::size_t postSmoothingSteps, bool additive=false)
 Construct a new amg with a specific coarse solver.
 AMG (const OperatorHierarchy &matrices, CoarseSolver &coarseSolver, const SmootherArgs &smootherArgs, const Parameters &parms)
 Construct a new amg with a specific coarse solver.
template<class C >
 AMG (const Operator &fineOperator, const C &criterion, const SmootherArgs &smootherArgs, std::size_t gamma, std::size_t preSmoothingSteps, std::size_t postSmoothingSteps, bool additive=false, const ParallelInformation &pinfo=ParallelInformation())
 Construct an AMG with an inexact coarse solver based on the smoother.
template<class C >
 AMG (const Operator &fineOperator, const C &criterion, const SmootherArgs &smootherArgs=SmootherArgs(), const ParallelInformation &pinfo=ParallelInformation())
 Construct an AMG with an inexact coarse solver based on the smoother.
 AMG (const AMG &amg)
 Copy constructor.
 ~AMG ()
void pre (Domain &x, Range &b)
 Prepare the preconditioner.
void apply (Domain &v, const Range &d)
 Apply one step of the preconditioner to the system A(v)=d.
void post (Domain &x)
 Clean up.
template<class A1 >
void getCoarsestAggregateNumbers (std::vector< std::size_t, A1 > &cont)
 Get the aggregate number of each unknown on the coarsest level.
std::size_t levels ()
std::size_t maxlevels ()
void recalculateHierarchy ()
 Recalculate the matrix hierarchy.
bool usesDirectCoarseLevelSolver () const
 Check whether the coarse solver used is a direct solver.

Friends

class KAMG
class KAmgTwoGrid< AMG >

Detailed Description

template<class M, class X, class S, class PI = SequentialInformation, class A = std::allocator<X>>
class Dune::Amg::AMG< M, X, S, PI, A >

Parallel algebraic multigrid based on agglomeration.

Template Parameters
MThe matrix type
XThe vector type
AAn allocator for X

Member Typedef Documentation

typedef X Dune::Preconditioner< X, X >::domain_type
inherited

The domain type of the preconditioner.

typedef X::field_type Dune::Preconditioner< X, X >::field_type
inherited

The field type of the preconditioner.

typedef X Dune::Preconditioner< X, X >::range_type
inherited

The range type of the preconditioner.


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