Data and methods for fully-assembled bilinear forms. More...

#include <bilinearform_ext.hpp>

Inheritance diagram for mfem::FABilinearFormExtension:

Collaboration diagram for mfem::FABilinearFormExtension:

Public Member Functions
	FABilinearFormExtension (BilinearForm *form)

void	Assemble ()
	Assemble at the level given for the BilinearFormExtension subclass.

void	RAP (OperatorHandle &A)

void	EliminateBC (const Array< int > &ess_dofs, OperatorHandle &A)

void	FormSystemMatrix (const Array< int > &ess_tdof_list, OperatorHandle &A)

void	FormLinearSystem (const Array< int > &ess_tdof_list, Vector &x, Vector &b, OperatorHandle &A, Vector &X, Vector &B, int copy_interior=0)

void	Mult (const Vector &x, Vector &y) const
	Operator application: `y=A(x)`.

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.

void	DGMult (const Vector &x, Vector &y) const

void	DGMultTranspose (const Vector &x, Vector &y) const

Public Member Functions inherited from mfem::EABilinearFormExtension
	EABilinearFormExtension (BilinearForm *form)

Public Member Functions inherited from mfem::PABilinearFormExtension
	PABilinearFormExtension (BilinearForm *)

void	Assemble ()
	Assemble at the level given for the BilinearFormExtension subclass.

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.

void	FormSystemMatrix (const Array< int > &ess_tdof_list, OperatorHandle &A)

void	FormLinearSystem (const Array< int > &ess_tdof_list, Vector &x, Vector &b, OperatorHandle &A, Vector &X, Vector &B, int copy_interior=0)

void	Mult (const Vector &x, Vector &y) const
	Operator application: `y=A(x)`.

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.

void	Update ()

Public Member Functions inherited from mfem::BilinearFormExtension
	BilinearFormExtension (BilinearForm *form)

virtual MemoryClass	GetMemoryClass () const
	Return the MemoryClass preferred by the Operator.

virtual const Operator *	GetProlongation () const
	Get the finite element space prolongation matrix.

virtual const Operator *	GetRestriction () const
	Get the finite element space restriction matrix.

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.

	Operator (int s=0)
	Construct a square Operator with given size s (default 0).

	Operator (int h, int w)
	Construct an Operator with the given height (output size) and width (input size).

int	Height () const
	Get the height (size of output) of the Operator. Synonym with NumRows().

int	NumRows () const
	Get the number of rows (size of output) of the Operator. Synonym with Height().

int	Width () const
	Get the width (size of input) of the Operator. Synonym with NumCols().

int	NumCols () const
	Get the number of columns (size of input) of the Operator. Synonym with Width().

virtual void	AddMult (const Vector &x, Vector &y, const real_t a=1.0) const
	Operator application: `y+=A(x)` (default) or `y+=a*A(x)`.

virtual void	AddMultTranspose (const Vector &x, Vector &y, const real_t a=1.0) const
	Operator transpose application: `y+=A^t(x)` (default) or `y+=a*A^t(x)`.

virtual void	ArrayMult (const Array< const Vector * > &X, Array< Vector * > &Y) const
	Operator application on a matrix: `Y=A(X)`.

virtual void	ArrayMultTranspose (const Array< const Vector * > &X, Array< Vector * > &Y) const
	Action of the transpose operator on a matrix: `Y=A^t(X)`.

virtual void	ArrayAddMult (const Array< const Vector * > &X, Array< Vector * > &Y, const real_t a=1.0) const
	Operator application on a matrix: `Y+=A(X)` (default) or `Y+=a*A(X)`.

virtual void	ArrayAddMultTranspose (const Array< const Vector * > &X, Array< Vector * > &Y, const real_t a=1.0) const
	Operator transpose application on a matrix: `Y+=A^t(X)` (default) or `Y+=a*A^t(X)`.

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.

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

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

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

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.

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.

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().

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

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).

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

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

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

virtual	~Operator ()
	Virtual destructor.

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

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...

Protected Member Functions inherited from mfem::PABilinearFormExtension
void	SetupRestrictionOperators (const L2FaceValues m)

void	AddMultWithMarkers (const BilinearFormIntegrator &integ, const Vector &x, const Array< int > *markers, const Array< int > &attributes, const bool transpose, Vector &y) const
	Accumulate the action (or transpose) of the integrator on x into y, taking into account the (possibly null) markers array.

void	AddMultNormalDerivativesWithMarkers (const BilinearFormIntegrator &integ, const Vector &x, const Vector &dxdn, const Array< int > *markers, const Array< int > &attributes, Vector &y, Vector &dydn) const
	Performs the same function as AddMultWithMarkers, but takes as input and output face normal derivatives.

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

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

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".

Protected Attributes inherited from mfem::EABilinearFormExtension
int	ne

int	elemDofs

Vector	ea_data

int	nf_int

int	nf_bdr

int	faceDofs

Vector	ea_data_int

Vector	ea_data_ext

Vector	ea_data_bdr

bool	factorize_face_terms

Protected Attributes inherited from mfem::PABilinearFormExtension
const FiniteElementSpace *	trial_fes

const FiniteElementSpace *	test_fes

Array< int >	elem_attributes
	Attributes of all mesh elements.

Array< int >	bdr_attributes

Vector	tmp_evec

Vector	localX

Vector	localY

Vector	int_face_X

Vector	int_face_Y

Vector	bdr_face_X

Vector	bdr_face_Y

Vector	int_face_dXdn

Vector	int_face_dYdn

Vector	bdr_face_dXdn

Vector	bdr_face_dYdn

const Operator *	elem_restrict

const FaceRestriction *	int_face_restrict_lex

const FaceRestriction *	bdr_face_restrict_lex

Protected Attributes inherited from mfem::BilinearFormExtension
BilinearForm *	a
	Not owned.

Protected Attributes inherited from mfem::Operator
int	height
	Dimension of the output / number of rows in the matrix.

int	width
	Dimension of the input / number of columns in the matrix.

Detailed Description

Data and methods for fully-assembled bilinear forms.

Definition at line 159 of file bilinearform_ext.hpp.

Constructor & Destructor Documentation

◆ FABilinearFormExtension()

mfem::FABilinearFormExtension::FABilinearFormExtension ( BilinearForm * form )

Definition at line 1186 of file bilinearform_ext.cpp.

Member Function Documentation

◆ Assemble()

void mfem::FABilinearFormExtension::Assemble ( )

virtual

Assemble at the level given for the BilinearFormExtension subclass.

Reimplemented from mfem::EABilinearFormExtension.

Definition at line 1200 of file bilinearform_ext.cpp.

◆ DGMult()

void mfem::FABilinearFormExtension::DGMult	(	const Vector &	x,
		Vector &	y ) const

DGMult and DGMultTranspose use the extended L-vector to perform the computation.

Definition at line 1365 of file bilinearform_ext.cpp.

◆ DGMultTranspose()

void mfem::FABilinearFormExtension::DGMultTranspose	(	const Vector &	x,
		Vector &	y ) const

Definition at line 1426 of file bilinearform_ext.cpp.

◆ EliminateBC()

void mfem::FABilinearFormExtension::EliminateBC	(	const Array< int > &	ess_dofs,
		OperatorHandle &	A )

Note: Always does DIAG_ONE policy to be consistent with Operator::FormConstrainedSystemOperator.

Definition at line 1326 of file bilinearform_ext.cpp.

◆ FormLinearSystem()

void mfem::FABilinearFormExtension::FormLinearSystem	(	const Array< int > &	ess_tdof_list,
		Vector &	x,
		Vector &	b,
		OperatorHandle &	A,
		Vector &	X,
		Vector &	B,
		int	copy_interior = 0 )

virtual

Implements mfem::BilinearFormExtension.

Definition at line 1353 of file bilinearform_ext.cpp.

◆ FormSystemMatrix()

void mfem::FABilinearFormExtension::FormSystemMatrix	(	const Array< int > &	ess_tdof_list,
		OperatorHandle &	A )

virtual

Implements mfem::BilinearFormExtension.

Definition at line 1346 of file bilinearform_ext.cpp.

◆ Mult()

void mfem::FABilinearFormExtension::Mult	(	const Vector &	x,
		Vector &	y ) const

virtual

Operator application: y=A(x).

Reimplemented from mfem::EABilinearFormExtension.

Definition at line 1414 of file bilinearform_ext.cpp.

◆ MultTranspose()

void mfem::FABilinearFormExtension::MultTranspose	(	const Vector &	x,
		Vector &	y ) const

virtual

Action of the transpose operator: y=A^t(x). The default behavior in class Operator is to generate an error.

Reimplemented from mfem::EABilinearFormExtension.

Definition at line 1475 of file bilinearform_ext.cpp.

◆ RAP()

void mfem::FABilinearFormExtension::RAP ( OperatorHandle & A )

Definition at line 1312 of file bilinearform_ext.cpp.

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

fem/bilinearform_ext.hpp
fem/bilinearform_ext.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ FABilinearFormExtension()

Member Function Documentation

◆ Assemble()

◆ DGMult()

◆ DGMultTranspose()

◆ EliminateBC()

◆ FormLinearSystem()

◆ FormSystemMatrix()

◆ Mult()

◆ MultTranspose()

◆ RAP()