5#ifndef GKO_PUBLIC_CORE_MULTIGRID_FIXED_COARSENING_HPP_
6#define GKO_PUBLIC_CORE_MULTIGRID_FIXED_COARSENING_HPP_
11#include <ginkgo/core/base/composition.hpp>
12#include <ginkgo/core/base/exception_helpers.hpp>
13#include <ginkgo/core/base/lin_op.hpp>
14#include <ginkgo/core/base/types.hpp>
15#include <ginkgo/core/matrix/csr.hpp>
16#include <ginkgo/core/matrix/dense.hpp>
17#include <ginkgo/core/multigrid/multigrid_level.hpp>
41template <
typename ValueType = default_precision,
typename IndexType =
int32>
43 :
public EnableLinOp<FixedCoarsening<ValueType, IndexType>>,
44 public EnableMultigridLevel<ValueType> {
49 using value_type = ValueType;
50 using index_type = IndexType;
59 return system_matrix_;
87 void apply_impl(
const LinOp* b,
LinOp* x)
const override
93 LinOp* x)
const override
102 explicit FixedCoarsening(
const Factory* factory,
103 std::shared_ptr<const LinOp> system_matrix)
106 EnableMultigridLevel<ValueType>(system_matrix),
107 parameters_{factory->get_parameters()},
108 system_matrix_{system_matrix}
110 if (system_matrix_->get_size()[0] != 0) {
119 std::shared_ptr<const LinOp> system_matrix_{};
The EnableLinOp mixin can be used to provide sensible default implementations of the majority of the ...
Definition lin_op.hpp:879
This mixin inherits from (a subclass of) PolymorphicObject and provides a base implementation of a ne...
Definition polymorphic_object.hpp:662
Definition lin_op.hpp:117
const dim< 2 > & get_size() const noexcept
Returns the size of the operator.
Definition lin_op.hpp:210
std::shared_ptr< const Executor > get_executor() const noexcept
Returns the Executor of the object.
Definition polymorphic_object.hpp:234
std::shared_ptr< Composition< default_precision > > get_composition() const
Definition composition.hpp:186
An array is a container which encapsulates fixed-sized arrays, stored on the Executor tied to the arr...
Definition array.hpp:166
Definition fixed_coarsening.hpp:83
FixedCoarsening is a very simple coarse grid generation algorithm.
Definition fixed_coarsening.hpp:44
std::shared_ptr< const LinOp > get_system_matrix() const
Returns the system operator (matrix) of the linear system.
Definition fixed_coarsening.hpp:57
#define GKO_CREATE_FACTORY_PARAMETERS(_parameters_name, _factory_name)
This Macro will generate a new type containing the parameters for the factory _factory_name.
Definition abstract_factory.hpp:280
#define GKO_FACTORY_PARAMETER_SCALAR(_name, _default)
Creates a scalar factory parameter in the factory parameters structure.
Definition abstract_factory.hpp:445
#define GKO_ENABLE_BUILD_METHOD(_factory_name)
Defines a build method for the factory, simplifying its construction by removing the repetitive typin...
Definition abstract_factory.hpp:394
#define GKO_ENABLE_LIN_OP_FACTORY(_lin_op, _parameters_name, _factory_name)
This macro will generate a default implementation of a LinOpFactory for the LinOp subclass it is defi...
Definition lin_op.hpp:1017
#define GKO_FACTORY_PARAMETER_VECTOR(_name,...)
Creates a vector factory parameter in the factory parameters structure.
Definition abstract_factory.hpp:461
The multigrid components namespace.
Definition matrix.hpp:34
The Ginkgo namespace.
Definition abstract_factory.hpp:20
array< IndexType > coarse_rows
This array specifies the rows of the fine matrix which should be selected as rows for the coarse matr...
Definition fixed_coarsening.hpp:69
bool skip_sorting
The system_matrix, which will be given to this factory, must be sorted (first by row,...
Definition fixed_coarsening.hpp:81