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MFEM
v4.5.1
Finite element discretization library
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Class extending the NonlinearForm class to support the different AssemblyLevels. More...
#include <nonlinearform_ext.hpp>
Public Member Functions | |
NonlinearFormExtension (const NonlinearForm *) | |
virtual void | Assemble ()=0 |
Assemble at the AssemblyLevel of the subclass. More... | |
virtual Operator & | GetGradient (const Vector &x) const =0 |
Return the gradient as an L-to-L Operator. The input x must be an L-vector (i.e. GridFunction-size vector). More... | |
virtual double | GetGridFunctionEnergy (const Vector &x) const =0 |
Compute the local (to the MPI rank) energy of the L-vector state x. More... | |
virtual void | Update ()=0 |
Called by NonlinearForm::Update() to reflect changes in the FE space. More... | |
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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 MemoryClass | GetMemoryClass () const |
Return the MemoryClass preferred by the Operator. 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 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 Attributes | |
const NonlinearForm * | nlf |
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 NonlinearForm class to support the different AssemblyLevels.
This class represents the action of the NonlinearForm as an L-to-L operator, i.e. both the input and output Vectors are L-vectors (GridFunction-size vectors). Essential boundary conditions are NOT applied to the action of the operator.
Definition at line 30 of file nonlinearform_ext.hpp.
mfem::NonlinearFormExtension::NonlinearFormExtension | ( | const NonlinearForm * | nlf | ) |
Definition at line 21 of file nonlinearform_ext.cpp.
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pure virtual |
Assemble at the AssemblyLevel of the subclass.
Implemented in mfem::MFNonlinearFormExtension, and mfem::PANonlinearFormExtension.
Return the gradient as an L-to-L Operator. The input x must be an L-vector (i.e. GridFunction-size vector).
Essential boundary conditions are NOT applied to the returned operator.
The returned gradient Operator defines the virtual method GetProlongation which enables support for the method FormSystemOperator to define the matrix-free global true-dof gradient with imposed boundary conditions.
Reimplemented from mfem::Operator.
Implemented in mfem::MFNonlinearFormExtension, and mfem::PANonlinearFormExtension.
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pure virtual |
Compute the local (to the MPI rank) energy of the L-vector state x.
Implemented in mfem::MFNonlinearFormExtension, and mfem::PANonlinearFormExtension.
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pure virtual |
Called by NonlinearForm::Update() to reflect changes in the FE space.
Implemented in mfem::MFNonlinearFormExtension, and mfem::PANonlinearFormExtension.
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protected |
Not owned.
Definition at line 33 of file nonlinearform_ext.hpp.