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MFEM
v4.5.1
Finite element discretization library
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Class extending the BilinearForm class to support different AssemblyLevels. More...
#include <bilinearform_ext.hpp>
Public Member Functions | |
BilinearFormExtension (BilinearForm *form) | |
virtual MemoryClass | GetMemoryClass () const |
Return the MemoryClass preferred by the Operator. More... | |
virtual const Operator * | GetProlongation () const |
Get the finite element space prolongation matrix. More... | |
virtual const Operator * | GetRestriction () const |
Get the finite element space restriction matrix. More... | |
virtual void | Assemble ()=0 |
Assemble at the level given for the BilinearFormExtension subclass. 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 void | FormSystemMatrix (const Array< int > &ess_tdof_list, OperatorHandle &A)=0 |
virtual void | FormLinearSystem (const Array< int > &ess_tdof_list, Vector &x, Vector &b, OperatorHandle &A, Vector &X, Vector &B, int copy_interior=0)=0 |
virtual void | Update ()=0 |
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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 void | Mult (const Vector &x, Vector &y) const =0 |
Operator application: y=A(x) . 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 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 Attributes | |
BilinearForm * | a |
Not owned. More... | |
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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 | |
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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... | |
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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... | |
Class extending the BilinearForm class to support different AssemblyLevels.
FA - Full Assembly PA - Partial Assembly EA - Element Assembly MF - Matrix Free
Definition at line 32 of file bilinearform_ext.hpp.
mfem::BilinearFormExtension::BilinearFormExtension | ( | BilinearForm * | form | ) |
Definition at line 24 of file bilinearform_ext.cpp.
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pure virtual |
Assemble at the level given for the BilinearFormExtension subclass.
Implemented in mfem::MFBilinearFormExtension, mfem::FABilinearFormExtension, mfem::EABilinearFormExtension, and mfem::PABilinearFormExtension.
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inlinevirtual |
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::Operator.
Reimplemented in mfem::MFBilinearFormExtension, and mfem::PABilinearFormExtension.
Definition at line 52 of file bilinearform_ext.hpp.
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pure virtual |
Implemented in mfem::MFBilinearFormExtension, mfem::FABilinearFormExtension, and mfem::PABilinearFormExtension.
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pure virtual |
Implemented in mfem::MFBilinearFormExtension, mfem::FABilinearFormExtension, and mfem::PABilinearFormExtension.
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inlinevirtual |
Return the MemoryClass preferred by the Operator.
This is the MemoryClass that will be used to access the input and output vectors in the Mult() and MultTranspose() methods.
For example, classes using the MFEM_FORALL macro for implementation can return the value returned by Device::GetMemoryClass().
The default implementation of this method in class Operator returns MemoryClass::HOST.
Reimplemented from mfem::Operator.
Definition at line 40 of file bilinearform_ext.hpp.
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virtual |
Get the finite element space prolongation matrix.
Reimplemented from mfem::Operator.
Definition at line 30 of file bilinearform_ext.cpp.
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virtual |
Get the finite element space restriction matrix.
Reimplemented from mfem::Operator.
Definition at line 35 of file bilinearform_ext.cpp.
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pure virtual |
Implemented in mfem::MFBilinearFormExtension, and mfem::PABilinearFormExtension.
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protected |
Not owned.
Definition at line 35 of file bilinearform_ext.hpp.