MFEM  v4.0
Finite element discretization library
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mfem::HypreBoomerAMG Class Reference

The BoomerAMG solver in hypre. More...

#include <hypre.hpp>

Inheritance diagram for mfem::HypreBoomerAMG:
Collaboration diagram for mfem::HypreBoomerAMG:

Public Member Functions

 HypreBoomerAMG ()
 HypreBoomerAMG (HypreParMatrix &A)
virtual void SetOperator (const Operator &op)
 Set/update the solver for the given operator. More...
void SetSystemsOptions (int dim)
void SetElasticityOptions (ParFiniteElementSpace *fespace)
void SetPrintLevel (int print_level)
virtual operator HYPRE_Solver () const
 The typecast to HYPRE_Solver returns the internal amg_precond. More...
virtual HYPRE_PtrToParSolverFcn SetupFcn () const
 hypre's internal Setup function More...
virtual HYPRE_PtrToParSolverFcn SolveFcn () const
 hypre's internal Solve function More...
virtual ~HypreBoomerAMG ()
- Public Member Functions inherited from mfem::HypreSolver
 HypreSolver ()
 HypreSolver (HypreParMatrix *_A)
virtual void Mult (const HypreParVector &b, HypreParVector &x) const
 Solve the linear system Ax=b. More...
virtual void Mult (const Vector &b, Vector &x) const
 Operator application: y=A(x). More...
virtual ~HypreSolver ()
- Public Member Functions inherited from mfem::Solver
 Solver (int s=0, bool iter_mode=false)
 Initialize a square Solver with size s. More...
 Solver (int h, int w, bool iter_mode=false)
 Initialize a Solver with height h and width w. More...
- Public Member Functions inherited from mfem::Operator
 Operator (int s=0)
 Construct a square Operator with given size s (default 0). More...
 Operator (int h, int w)
 Construct an Operator with the given height (output size) and width (input size). More...
int Height () const
 Get the height (size of output) of the Operator. Synonym with NumRows(). More...
int NumRows () const
 Get the number of rows (size of output) of the Operator. Synonym with Height(). More...
int Width () const
 Get the width (size of input) of the Operator. Synonym with NumCols(). More...
int NumCols () const
 Get the number of columns (size of input) of the Operator. Synonym with Width(). More...
virtual MemoryClass GetMemoryClass () const
 Return the MemoryClass preferred by the Operator. More...
virtual void MultTranspose (const Vector &x, Vector &y) const
 Action of the transpose operator: y=A^t(x). The default behavior in class Operator is to generate an error. More...
virtual OperatorGetGradient (const Vector &x) const
 Evaluate the gradient operator at the point x. The default behavior in class Operator is to generate an error. More...
virtual const OperatorGetProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to input vectors for the operator. NULL means identity. More...
virtual const OperatorGetRestriction () const
 Restriction operator from input vectors for the operator to linear algebra (linear system) vectors. NULL means identity. More...
void FormLinearSystem (const Array< int > &ess_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B, int copy_interior=0)
 Form a constrained linear system using a matrix-free approach. More...
virtual void RecoverFEMSolution (const Vector &X, const Vector &b, Vector &x)
 Reconstruct a solution vector x (e.g. a GridFunction) from the solution X of a constrained linear system obtained from Operator::FormLinearSystem(). More...
void PrintMatlab (std::ostream &out, int n=0, int m=0) const
 Prints operator with input size n and output size m in Matlab format. More...
virtual ~Operator ()
 Virtual destructor. More...
Type GetType () const
 Return the type ID of the Operator class. More...

Additional Inherited Members

- Public Types inherited from mfem::Operator
enum  Type {
 Enumeration defining IDs for some classes derived from Operator. More...
- Public Attributes inherited from mfem::Solver
bool iterative_mode
 If true, use the second argument of Mult() as an initial guess. More...
- Protected Attributes inherited from mfem::HypreSolver
 The linear system matrix. More...
 Right-hand side and solution vector. More...
int setup_called
 Was hypre's Setup function called already? More...
- Protected Attributes inherited from mfem::Operator
int height
 Dimension of the output / number of rows in the matrix. More...
int width
 Dimension of the input / number of columns in the matrix. More...

Detailed Description

The BoomerAMG solver in hypre.

Definition at line 873 of file hypre.hpp.

Constructor & Destructor Documentation

mfem::HypreBoomerAMG::HypreBoomerAMG ( )

Definition at line 2490 of file hypre.cpp.

mfem::HypreBoomerAMG::HypreBoomerAMG ( HypreParMatrix A)

Definition at line 2496 of file hypre.cpp.

mfem::HypreBoomerAMG::~HypreBoomerAMG ( )

Definition at line 2743 of file hypre.cpp.

Member Function Documentation

virtual mfem::HypreBoomerAMG::operator HYPRE_Solver ( ) const

The typecast to HYPRE_Solver returns the internal amg_precond.

Implements mfem::HypreSolver.

Definition at line 918 of file hypre.hpp.

void mfem::HypreBoomerAMG::SetElasticityOptions ( ParFiniteElementSpace fespace)

A special elasticity version of BoomerAMG that takes advantage of geometric rigid body modes and could perform better on some problems, see "Improving algebraic multigrid interpolation operators for linear elasticity problems", Baker, Kolev, Yang, NLAA 2009, DOI:10.1002/nla.688. As with SetSystemsOptions(), this solver assumes Ordering::byVDIM.

Definition at line 2707 of file hypre.cpp.

void mfem::HypreBoomerAMG::SetOperator ( const Operator op)

Set/update the solver for the given operator.

Reimplemented from mfem::HypreSolver.

Definition at line 2608 of file hypre.cpp.

void mfem::HypreBoomerAMG::SetPrintLevel ( int  print_level)

Definition at line 914 of file hypre.hpp.

void mfem::HypreBoomerAMG::SetSystemsOptions ( int  dim)

More robust options for systems, such as elasticity. Note that BoomerAMG assumes Ordering::byVDIM in the finite element space used to generate the matrix A.

Definition at line 2625 of file hypre.cpp.

virtual HYPRE_PtrToParSolverFcn mfem::HypreBoomerAMG::SetupFcn ( ) const

hypre's internal Setup function

Implements mfem::HypreSolver.

Definition at line 920 of file hypre.hpp.

virtual HYPRE_PtrToParSolverFcn mfem::HypreBoomerAMG::SolveFcn ( ) const

hypre's internal Solve function

Implements mfem::HypreSolver.

Definition at line 922 of file hypre.hpp.

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