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MueLu_ProjectorSmoother_decl.hpp
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5// MueLu: A package for multigrid based preconditioning
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46#ifndef MUELU_PROJECTORSMOOTHER_DECL_HPP
47#define MUELU_PROJECTORSMOOTHER_DECL_HPP
48
49#include <Xpetra_Matrix_fwd.hpp>
50#include <Xpetra_MultiVector_fwd.hpp>
51
52#include "MueLu_ConfigDefs.hpp"
53
54#include "MueLu_SmootherPrototype.hpp"
57
58namespace MueLu {
59
76 template <class Scalar = SmootherPrototype<>::scalar_type,
80 class ProjectorSmoother : public SmootherPrototype<Scalar,LocalOrdinal,GlobalOrdinal,Node>
81 {
82#undef MUELU_PROJECTORSMOOTHER_SHORT
84
85 public:
86
88
89
91 ProjectorSmoother(RCP<SmootherPrototype> coarseSolver);
92
94 virtual ~ProjectorSmoother();
96
98
99
100 void DeclareInput(Level &currentLevel) const;
101
103
105
106
108 void Setup(Level &currentLevel);
109
116 void Apply(MultiVector& X, const MultiVector& B, bool InitialGuessIsZero = false) const;
118
119 RCP<SmootherPrototype> Copy() const;
120
122
123
125 std::string description() const;
126
128 //using MueLu::Describable::describe; // overloading, not hiding
129 void print(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const;
130
132 size_t getNodeSmootherComplexity() const {return coarseSolver_->getNodeSmootherComplexity();}
133
134
136
137 private:
138 RCP<MultiVector> Borth_;
139 RCP<SmootherPrototype> coarseSolver_;
140
141 }; // class ProjectorSmoother
142
143} // namespace MueLu
144
145#define MUELU_PROJECTORSMOOTHER_SHORT
146#endif // MUELU_PROJECTORSMOOTHER_DECL_HPP
MueLu::DefaultLocalOrdinal LocalOrdinal
MueLu::DefaultGlobalOrdinal GlobalOrdinal
MueLu::DefaultNode Node
Class that holds all level-specific information.
Definition: MueLu_Level.hpp:99
This class enables the elimination of the nullspace component of the solution through the use of proj...
RCP< SmootherPrototype > coarseSolver_
void Apply(MultiVector &X, const MultiVector &B, bool InitialGuessIsZero=false) const
Apply the direct solver. Solves the linear system AX=B using the constructed solver.
RCP< SmootherPrototype > Copy() const
void print(Teuchos::FancyOStream &out, const VerbLevel verbLevel=Default) const
Print the object with some verbosity level to an FancyOStream object.
void Setup(Level &currentLevel)
Set up the direct solver.
size_t getNodeSmootherComplexity() const
Get a rough estimate of cost per iteration.
std::string description() const
Return a simple one-line description of this object.
void DeclareInput(Level &currentLevel) const
Input.
Base class for smoother prototypes.
Namespace for MueLu classes and methods.