dealii::AmgProjector< dim, MatrixType, Number > Class Template Reference

#include <multigrid_amg.h>

Public Member Functions
	AmgProjector (const std::vector< TrilinosWrappers::SparseMatrix > &transfers_)
	AmgProjector (const MGLevelObject< TrilinosWrappers::SparseMatrix > &transfers_)
void	compute_level_matrices (MGLevelObject< std::unique_ptr< MatrixType > > &mg_matrices)
void	compute_level_matrices_as_linear_operators (MGLevelObject< std::unique_ptr< MatrixType > > &mg_matrices, MGLevelObject< LinearOperatorMG< LinearAlgebra::distributed::Vector< Number >, LinearAlgebra::distributed::Vector< Number > > > &multigrid_matrices_lo)
void	compute_level_matrices (MGLevelObject< MatrixType > &mg_matrices)

Private Types
using	VectorType = LinearAlgebra::distributed::Vector<Number>

Private Attributes
MPI_Comm	communicator
std::vector< const MatrixType * >	transfer_matrices

Detailed Description

template<int dim, typename MatrixType, typename Number = double>
class dealii::AmgProjector< dim, MatrixType, Number >

Same as above, but matrix-based.

Definition at line 202 of file multigrid_amg.h.

Member Typedef Documentation

VectorType

template<int dim, typename MatrixType , typename Number = double>

using dealii::AmgProjector< dim, MatrixType, Number >::VectorType = LinearAlgebra::distributed::Vector<Number>

private

Definition at line 205 of file multigrid_amg.h.

Constructor & Destructor Documentation

AmgProjector() [1/2]

template<int dim, typename MatrixType , typename Number = double>

dealii::AmgProjector< dim, MatrixType, Number >::AmgProjector ( const std::vector< TrilinosWrappers::SparseMatrix > & transfers_ )

inline

Constructor. It takes the matrix-free operator evaluation on the finest level, and a series of transfers from levels.

Definition at line 228 of file multigrid_amg.h.

References dealii::AmgProjector< dim, MatrixType, Number >::communicator, LinearAlgebra::distributed::Vector< typename Number, typename MemorySpace >::get_mpi_communicator(), l(), and dealii::AmgProjector< dim, MatrixType, Number >::transfer_matrices.

AmgProjector() [2/2]

template<int dim, typename MatrixType , typename Number = double>

dealii::AmgProjector< dim, MatrixType, Number >::AmgProjector ( const MGLevelObject< TrilinosWrappers::SparseMatrix > & transfers_ )

inline

Same as above, but taking a vector of TrilinosWrappers::SparseMatrix objects to be used in a multilevel context.

Definition at line 248 of file multigrid_amg.h.

References dealii::AmgProjector< dim, MatrixType, Number >::communicator, l(), MGLevelObject< class Object >::n_levels(), MGLevelObject< class Object >::resize(), and dealii::AmgProjector< dim, MatrixType, Number >::transfer_matrices.

Member Function Documentation

compute_level_matrices() [1/2]

template<int dim, typename MatrixType , typename Number = double>

void dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices ( MGLevelObject< MatrixType > & mg_matrices )

inline

Definition at line 367 of file multigrid_amg.h.

References Assert, dealii::AmgProjector< dim, MatrixType, Number >::communicator, l(), MGLevelObject< class Object >::max_level(), MGLevelObject< class Object >::min_level(), MGLevelObject< class Object >::n_levels(), and dealii::AmgProjector< dim, MatrixType, Number >::transfer_matrices.

compute_level_matrices() [2/2]

template<int dim, typename MatrixType , typename Number = double>

void dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices ( MGLevelObject< std::unique_ptr< MatrixType > > & mg_matrices )

inline

Initialize level matrices using the operator evaluation and the transfer matrices provided in the constructor.

In particular, matrix[0]= A0, while for the other levels it holds that: matrix[l] = P_l^T A_l-1 P_l, being P_l the two-level injection.

Definition at line 275 of file multigrid_amg.h.

References Assert, dealii::AmgProjector< dim, MatrixType, Number >::communicator, l(), and dealii::AmgProjector< dim, MatrixType, Number >::transfer_matrices.

compute_level_matrices_as_linear_operators()

template<int dim, typename MatrixType , typename Number = double>

void dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices_as_linear_operators ( MGLevelObject< std::unique_ptr< MatrixType > > & mg_matrices, MGLevelObject< LinearOperatorMG< LinearAlgebra::distributed::Vector< Number >, LinearAlgebra::distributed::Vector< Number > > > & multigrid_matrices_lo )

inline

Similar to above, but wrapping all multigrid matrices in a LinearOperatorMG. This can be used if you want to use the matrix-free action on some levels, and the matrix-based version on other ones. Since the common thing between these approaches is the presence of a vmult() function, a LinearOperatorMG object can store both actions simultaneously.

Definition at line 321 of file multigrid_amg.h.

References Assert, dealii::AmgProjector< dim, MatrixType, Number >::communicator, l(), and dealii::AmgProjector< dim, MatrixType, Number >::transfer_matrices.

Member Data Documentation

communicator

template<int dim, typename MatrixType , typename Number = double>

MPI_Comm dealii::AmgProjector< dim, MatrixType, Number >::communicator

private

MPI communicator used by Trilinos objects.

Definition at line 209 of file multigrid_amg.h.

Referenced by dealii::AmgProjector< dim, MatrixType, Number >::AmgProjector(), dealii::AmgProjector< dim, MatrixType, Number >::AmgProjector(), dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices(), dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices(), and dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices_as_linear_operators().

transfer_matrices

template<int dim, typename MatrixType , typename Number = double>

std::vector<const MatrixType *> dealii::AmgProjector< dim, MatrixType, Number >::transfer_matrices

private

Fine operator evaluation. Vector of (pointers of) Trilinos Matrices storing two-level projections.

Definition at line 219 of file multigrid_amg.h.

Referenced by dealii::AmgProjector< dim, MatrixType, Number >::AmgProjector(), dealii::AmgProjector< dim, MatrixType, Number >::AmgProjector(), dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices(), dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices(), and dealii::AmgProjector< dim, MatrixType, Number >::compute_level_matrices_as_linear_operators().

---

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

• /github/workspace/include/multigrid_amg.h