MFEM  v4.4.0
Finite element discretization library
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mfem::MFBilinearFormExtension Class Reference

Data and methods for matrix-free bilinear forms. More...

#include <bilinearform_ext.hpp>

Inheritance diagram for mfem::MFBilinearFormExtension:
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Collaboration diagram for mfem::MFBilinearFormExtension:
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Public Member Functions

 MFBilinearFormExtension (BilinearForm *form)
 
void Assemble ()
 Assemble at the level given for the BilinearFormExtension subclass. More...
 
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...
 
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). More...
 
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...
 
void Update ()
 
- Public Member Functions inherited from mfem::BilinearFormExtension
 BilinearFormExtension (BilinearForm *form)
 
virtual MemoryClass GetMemoryClass () const
 Return the MemoryClass preferred by the Operator. More...
 
virtual const OperatorGetProlongation () const
 Get the finite element space prolongation matrix. More...
 
virtual const OperatorGetRestriction () const
 Get the finite element space restriction matrix. 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 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 OperatorGetOutputProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to output vectors for the operator. NULL means identity. More...
 
virtual const OperatorGetOutputRestrictionTranspose () const
 Transpose of GetOutputRestriction, directly available in this form to facilitate matrix-free RAP-type operators. More...
 
virtual const OperatorGetOutputRestriction () 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 Attributes

const FiniteElementSpacetrial_fes
 
const FiniteElementSpacetest_fes
 
Vector localX
 
Vector localY
 
Vector int_face_X
 
Vector int_face_Y
 
Vector bdr_face_X
 
Vector bdr_face_Y
 
const Operatorelem_restrict
 
const FaceRestrictionint_face_restrict_lex
 
const FaceRestrictionbdr_face_restrict_lex
 
- Protected Attributes inherited from mfem::BilinearFormExtension
BilinearForma
 Not owned. 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
}
 Enumeration defining IDs for some classes derived from Operator. 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...
 
OperatorSetupRAP (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...
 

Detailed Description

Data and methods for matrix-free bilinear forms.

Definition at line 138 of file bilinearform_ext.hpp.

Constructor & Destructor Documentation

mfem::MFBilinearFormExtension::MFBilinearFormExtension ( BilinearForm form)

Definition at line 41 of file bilinearform_ext.cpp.

Member Function Documentation

void mfem::MFBilinearFormExtension::Assemble ( )
virtual

Assemble at the level given for the BilinearFormExtension subclass.

Implements mfem::BilinearFormExtension.

Definition at line 51 of file bilinearform_ext.cpp.

void mfem::MFBilinearFormExtension::AssembleDiagonal ( Vector diag) const
virtual

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.

Reimplemented from mfem::BilinearFormExtension.

Definition at line 61 of file bilinearform_ext.cpp.

void mfem::MFBilinearFormExtension::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 115 of file bilinearform_ext.cpp.

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

Implements mfem::BilinearFormExtension.

Definition at line 107 of file bilinearform_ext.cpp.

void mfem::MFBilinearFormExtension::Mult ( const Vector x,
Vector y 
) const
virtual

Operator application: y=A(x).

Implements mfem::Operator.

Definition at line 126 of file bilinearform_ext.cpp.

void mfem::MFBilinearFormExtension::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::Operator.

Definition at line 184 of file bilinearform_ext.cpp.

void mfem::MFBilinearFormExtension::Update ( )
virtual

Implements mfem::BilinearFormExtension.

Definition at line 95 of file bilinearform_ext.cpp.

Member Data Documentation

const FaceRestriction* mfem::MFBilinearFormExtension::bdr_face_restrict_lex
protected

Definition at line 147 of file bilinearform_ext.hpp.

Vector mfem::MFBilinearFormExtension::bdr_face_X
mutableprotected

Definition at line 144 of file bilinearform_ext.hpp.

Vector mfem::MFBilinearFormExtension::bdr_face_Y
mutableprotected

Definition at line 144 of file bilinearform_ext.hpp.

const Operator* mfem::MFBilinearFormExtension::elem_restrict
protected

Definition at line 145 of file bilinearform_ext.hpp.

const FaceRestriction* mfem::MFBilinearFormExtension::int_face_restrict_lex
protected

Definition at line 146 of file bilinearform_ext.hpp.

Vector mfem::MFBilinearFormExtension::int_face_X
mutableprotected

Definition at line 143 of file bilinearform_ext.hpp.

Vector mfem::MFBilinearFormExtension::int_face_Y
mutableprotected

Definition at line 143 of file bilinearform_ext.hpp.

Vector mfem::MFBilinearFormExtension::localX
mutableprotected

Definition at line 142 of file bilinearform_ext.hpp.

Vector mfem::MFBilinearFormExtension::localY
mutableprotected

Definition at line 142 of file bilinearform_ext.hpp.

const FiniteElementSpace * mfem::MFBilinearFormExtension::test_fes
protected

Definition at line 141 of file bilinearform_ext.hpp.

const FiniteElementSpace* mfem::MFBilinearFormExtension::trial_fes
protected

Definition at line 141 of file bilinearform_ext.hpp.


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