#include <solvers.hpp>

Inheritance diagram for mfem::LBFGSSolver:

Collaboration diagram for mfem::LBFGSSolver:

Public Member Functions
	LBFGSSolver ()

	LBFGSSolver (MPI_Comm comm_)

virtual void	SetOperator (const Operator &op)
	Also calls SetOperator for the preconditioner if there is one. More...

void	SetHistorySize (int dim)

virtual void	Mult (const Vector &b, Vector &x) const
	Solve the nonlinear system with right-hand side b. More...

virtual void	SetPreconditioner (Solver &pr)
	This should be called before SetOperator. More...

virtual void	SetSolver (Solver &solver)
	Set the linear solver for inverting the Jacobian. More...

virtual	~LBFGSSolver ()

Public Member Functions inherited from mfem::NewtonSolver
	NewtonSolver ()

	NewtonSolver (MPI_Comm comm_)

virtual double	ComputeScalingFactor (const Vector &x, const Vector &b) const
	This method can be overloaded in derived classes to implement line search algorithms. More...

virtual void	ProcessNewState (const Vector &x) const
	This method can be overloaded in derived classes to perform computations that need knowledge of the newest Newton state. More...

void	SetAdaptiveLinRtol (const int type=2, const double rtol0=0.5, const double rtol_max=0.9, const double alpha=0.5 *(1.0+sqrt(5.0)), const double gamma=1.0)
	Enable adaptive linear solver relative tolerance algorithm. More...

Public Member Functions inherited from mfem::IterativeSolver
	IterativeSolver ()

	IterativeSolver (MPI_Comm comm_)

void	SetMonitor (IterativeSolverMonitor &m)
	Set the iterative solver monitor. More...

MPI_Comm	GetComm () const
	Return the associated MPI communicator, or MPI_COMM_NULL if no communicator is set. More...

void	SetRelTol (double rtol)

void	SetAbsTol (double atol)

void	SetMaxIter (int max_it)

virtual void	SetPrintLevel (int print_lvl)
	Legacy method to set the level of verbosity of the solver output. More...

virtual void	SetPrintLevel (PrintLevel)
	Set the level of verbosity of the solver output. More...

int	GetNumIterations () const

bool	GetConverged () const

double	GetFinalNorm () const

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
void	InitTVectors (const Operator Po, const Operator Ri, const Operator *Pi, Vector &x, Vector &b, Vector &X, Vector &B) const
	Initializes memory for true vectors of linear system. More...

	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 Operator &	GetGradient (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 void	AssembleDiagonal (Vector &diag) const
	Computes the diagonal entries into diag. Typically, this operation only makes sense for linear Operators. In some cases, only an approximation of the diagonal is computed. More...

virtual const Operator *	GetProlongation () const
	Prolongation operator from linear algebra (linear system) vectors, to input vectors for the operator. `NULL` means identity. More...

virtual const Operator *	GetRestriction () const
	Restriction operator from input vectors for the operator to linear algebra (linear system) vectors. `NULL` means identity. More...

virtual const Operator *	GetOutputProlongation () const
	Prolongation operator from linear algebra (linear system) vectors, to output vectors for the operator. `NULL` means identity. More...

virtual const Operator *	GetOutputRestrictionTranspose () const
	Transpose of GetOutputRestriction, directly available in this form to facilitate matrix-free RAP-type operators. More...

virtual const Operator *	GetOutputRestriction () const
	Restriction operator from output 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...

void	FormRectangularLinearSystem (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B)
	Form a column-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() or Operator::FormRectangularLinearSystem(). More...

void	FormSystemOperator (const Array< int > &ess_tdof_list, Operator *&A)
	Return in A a parallel (on truedofs) version of this square operator. More...

void	FormRectangularSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Operator *&A)
	Return in A a parallel (on truedofs) version of this rectangular operator (including constraints). More...

void	FormDiscreteOperator (Operator *&A)
	Return in A a parallel (on truedofs) version of this rectangular operator. More...

void	PrintMatlab (std::ostream &out, int n, int m=0) const
	Prints operator with input size n and output size m in Matlab format. More...

virtual void	PrintMatlab (std::ostream &out) const
	Prints operator in Matlab format. More...

virtual	~Operator ()
	Virtual destructor. More...

Type	GetType () const
	Return the type ID of the Operator class. More...

Protected Member Functions
void	DeleteStorageVectors ()

void	InitializeStorageVectors ()

Protected Member Functions inherited from mfem::NewtonSolver
void	AdaptiveLinRtolPreSolve (const Vector &x, const int it, const double fnorm) const
	Method for the adaptive linear solver rtol invoked before the linear solve. More...

void	AdaptiveLinRtolPostSolve (const Vector &x, const Vector &b, const int it, const double fnorm) const
	Method for the adaptive linear solver rtol invoked after the linear solve. More...

Protected Member Functions inherited from mfem::IterativeSolver
double	Dot (const Vector &x, const Vector &y) const

double	Norm (const Vector &x) const

void	Monitor (int it, double norm, const Vector &r, const Vector &x, bool final=false) const

PrintLevel	FromLegacyPrintLevel (int)
	Convert a legacy print level integer to a PrintLevel object. More...

Protected Member Functions inherited from mfem::Operator
void	FormConstrainedSystemOperator (const Array< int > &ess_tdof_list, ConstrainedOperator *&Aout)
	see FormSystemOperator() More...

void	FormRectangularConstrainedSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, RectangularConstrainedOperator *&Aout)
	see FormRectangularSystemOperator() More...

Operator *	SetupRAP (const Operator Pi, const Operator Po)
	Returns RAP Operator of this, using input/output Prolongation matrices Pi corresponds to "P", Po corresponds to "Rt". More...

Protected Attributes
int	m = 10

Array< Vector * >	skArray

Array< Vector * >	ykArray

Protected Attributes inherited from mfem::NewtonSolver
Vector	r

Vector	c

Operator *	grad

int	lin_rtol_type = 0

double	lin_rtol0

double	lin_rtol_max

double	fnorm_last = 0.0

double	lnorm_last = 0.0

double	eta_last = 0.0

double	gamma

double	alpha

Protected Attributes inherited from mfem::IterativeSolver
const Operator *	oper

Solver *	prec

IterativeSolverMonitor *	monitor = nullptr

int	max_iter
	Limit for the number of iterations the solver is allowed to do. More...

double	rel_tol
	Relative tolerance. More...

double	abs_tol
	Absolute tolerance. More...

int	final_iter

bool	converged

double	final_norm

int	print_level = -1
	(DEPRECATED) Legacy print level definition, which is left for compatibility with custom iterative solvers. More...

PrintLevel	print_options
	Output behavior for the iterative solver. 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...

Additional Inherited Members
Public Types inherited from mfem::Operator
enum	DiagonalPolicy { DIAG_ZERO, DIAG_ONE, DIAG_KEEP }
	Defines operator diagonal policy upon elimination of rows and/or columns. More...

enum	Type { ANY_TYPE, MFEM_SPARSEMAT, Hypre_ParCSR, PETSC_MATAIJ, PETSC_MATIS, PETSC_MATSHELL, PETSC_MATNEST, PETSC_MATHYPRE, PETSC_MATGENERIC, Complex_Operator, MFEM_ComplexSparseMat, Complex_Hypre_ParCSR, Complex_DenseMat, MFEM_Block_Matrix, MFEM_Block_Operator }
	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...

Static Protected Member Functions inherited from mfem::IterativeSolver
static int	GuessLegacyPrintLevel (PrintLevel)
	Use some heuristics to guess a legacy print level corresponding to the given PrintLevel. More...

Detailed Description

L-BFGS method for solving F(x)=b for a given operator F, by minimizing the norm of F(x) - b. Requires only the action of the operator F.

Definition at line 698 of file solvers.hpp.

Constructor & Destructor Documentation

mfem::LBFGSSolver::LBFGSSolver ( )

inline

Definition at line 728 of file solvers.hpp.

mfem::LBFGSSolver::LBFGSSolver ( MPI_Comm comm_ )

inline

Definition at line 731 of file solvers.hpp.

virtual mfem::LBFGSSolver::~LBFGSSolver ( )

inlinevirtual

Definition at line 755 of file solvers.hpp.

Member Function Documentation

void mfem::LBFGSSolver::DeleteStorageVectors ( )

inlineprotected

Definition at line 704 of file solvers.hpp.

void mfem::LBFGSSolver::InitializeStorageVectors ( )

inlineprotected

Definition at line 713 of file solvers.hpp.

void mfem::LBFGSSolver::Mult	(	const Vector &	b,
		Vector &	x
	)		const

virtual

Solve the nonlinear system with right-hand side b.

If b.Size() != Height(), then b is assumed to be zero.

Reimplemented from mfem::NewtonSolver.

Reimplemented in mfem::TMOPNewtonSolver.

Definition at line 2002 of file solvers.cpp.

void mfem::LBFGSSolver::SetHistorySize ( int dim )

inline

Definition at line 740 of file solvers.hpp.

virtual void mfem::LBFGSSolver::SetOperator ( const Operator & op )

inlinevirtual

Also calls SetOperator for the preconditioner if there is one.

Reimplemented from mfem::NewtonSolver.

Definition at line 734 of file solvers.hpp.

virtual void mfem::LBFGSSolver::SetPreconditioner ( Solver & pr )

inlinevirtual

This should be called before SetOperator.

Reimplemented from mfem::IterativeSolver.

Reimplemented in mfem::TMOPNewtonSolver.

Definition at line 750 of file solvers.hpp.

virtual void mfem::LBFGSSolver::SetSolver ( Solver & solver )

inlinevirtual

Set the linear solver for inverting the Jacobian.

This method is equivalent to calling SetPreconditioner().

Reimplemented from mfem::NewtonSolver.

Reimplemented in mfem::TMOPNewtonSolver.

Definition at line 752 of file solvers.hpp.

Member Data Documentation

int mfem::LBFGSSolver::m = 10

protected

Definition at line 701 of file solvers.hpp.

Array<Vector *> mfem::LBFGSSolver::skArray

mutableprotected

Definition at line 702 of file solvers.hpp.

Array<Vector *> mfem::LBFGSSolver::ykArray

mutableprotected

Definition at line 702 of file solvers.hpp.

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

linalg/solvers.hpp
linalg/solvers.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation