MFEM  v4.6.0
Finite element discretization library
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
mfem::L2ProjectionGridTransfer::L2Projection Class Referenceabstract

#include <transfer.hpp>

Inheritance diagram for mfem::L2ProjectionGridTransfer::L2Projection:
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Collaboration diagram for mfem::L2ProjectionGridTransfer::L2Projection:
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Public Member Functions

virtual void Prolongate (const Vector &x, Vector &y) const =0
 
virtual void ProlongateTranspose (const Vector &x, Vector &y) const =0
 
virtual void SetRelTol (double p_rtol_)=0
 Sets relative tolerance in preconditioned conjugate gradient solver. More...
 
virtual void SetAbsTol (double p_atol_)=0
 Sets absolute tolerance in preconditioned conjugate gradient solver. 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 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 AddMult (const Vector &x, Vector &y, const double a=1.0) const
 Operator application: y+=A(x) (default) or y+=a*A(x). More...
 
virtual void AddMultTranspose (const Vector &x, Vector &y, const double a=1.0) const
 Operator transpose application: y+=A^t(x) (default) or y+=a*A^t(x). More...
 
virtual void ArrayMult (const Array< const Vector *> &X, Array< Vector *> &Y) const
 Operator application on a matrix: Y=A(X). More...
 
virtual void ArrayMultTranspose (const Array< const Vector *> &X, Array< Vector *> &Y) const
 Action of the transpose operator on a matrix: Y=A^t(X). More...
 
virtual void ArrayAddMult (const Array< const Vector *> &X, Array< Vector *> &Y, const double a=1.0) const
 Operator application on a matrix: Y+=A(X) (default) or Y+=a*A(X). More...
 
virtual void ArrayAddMultTranspose (const Array< const Vector *> &X, Array< Vector *> &Y, const double a=1.0) const
 Operator transpose application on a matrix: Y+=A^t(X) (default) or Y+=a*A^t(X). 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 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 OperatorGetProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to input vectors for the operator. NULL means identity. More...
 
virtual const OperatorGetRestriction () const
 Restriction operator from input vectors for the operator to linear algebra (linear system) vectors. NULL means identity. 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 Member Functions

 L2Projection (const FiniteElementSpace &fes_ho_, const FiniteElementSpace &fes_lor_)
 
void BuildHo2Lor (int nel_ho, int nel_lor, const CoarseFineTransformations &cf_tr)
 
void ElemMixedMass (Geometry::Type geom, const FiniteElement &fe_ho, const FiniteElement &fe_lor, ElementTransformation *el_tr, IntegrationPointTransformation &ip_tr, DenseMatrix &M_mixed_el) const
 
- 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...
 

Protected Attributes

const FiniteElementSpacefes_ho
 
const FiniteElementSpacefes_lor
 
Table ho2lor
 
- 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...
 

Detailed Description

Abstract class representing projection operator between a high-order finite element space on a coarse mesh, and a low-order finite element space on a refined mesh (LOR). We assume that the low-order space, fes_lor, lives on a mesh obtained by refining the mesh of the high-order space, fes_ho.

Definition at line 178 of file transfer.hpp.

Constructor & Destructor Documentation

◆ L2Projection()

mfem::L2ProjectionGridTransfer::L2Projection::L2Projection ( const FiniteElementSpace fes_ho_,
const FiniteElementSpace fes_lor_ 
)
protected

Definition at line 231 of file transfer.cpp.

Member Function Documentation

◆ BuildHo2Lor()

void mfem::L2ProjectionGridTransfer::L2Projection::BuildHo2Lor ( int  nel_ho,
int  nel_lor,
const CoarseFineTransformations cf_tr 
)
protected

Definition at line 238 of file transfer.cpp.

◆ ElemMixedMass()

void mfem::L2ProjectionGridTransfer::L2Projection::ElemMixedMass ( Geometry::Type  geom,
const FiniteElement fe_ho,
const FiniteElement fe_lor,
ElementTransformation el_tr,
IntegrationPointTransformation ip_tr,
DenseMatrix M_mixed_el 
) const
protected

Definition at line 258 of file transfer.cpp.

◆ Prolongate()

virtual void mfem::L2ProjectionGridTransfer::L2Projection::Prolongate ( const Vector x,
Vector y 
) const
pure virtual

◆ ProlongateTranspose()

virtual void mfem::L2ProjectionGridTransfer::L2Projection::ProlongateTranspose ( const Vector x,
Vector y 
) const
pure virtual

◆ SetAbsTol()

virtual void mfem::L2ProjectionGridTransfer::L2Projection::SetAbsTol ( double  p_atol_)
pure virtual

Sets absolute tolerance in preconditioned conjugate gradient solver.

Only used for H1 spaces.

Implemented in mfem::L2ProjectionGridTransfer::L2ProjectionH1Space, and mfem::L2ProjectionGridTransfer::L2ProjectionL2Space.

◆ SetRelTol()

virtual void mfem::L2ProjectionGridTransfer::L2Projection::SetRelTol ( double  p_rtol_)
pure virtual

Sets relative tolerance in preconditioned conjugate gradient solver.

Only used for H1 spaces.

Implemented in mfem::L2ProjectionGridTransfer::L2ProjectionH1Space, and mfem::L2ProjectionGridTransfer::L2ProjectionL2Space.

Member Data Documentation

◆ fes_ho

const FiniteElementSpace& mfem::L2ProjectionGridTransfer::L2Projection::fes_ho
protected

Definition at line 194 of file transfer.hpp.

◆ fes_lor

const FiniteElementSpace& mfem::L2ProjectionGridTransfer::L2Projection::fes_lor
protected

Definition at line 195 of file transfer.hpp.

◆ ho2lor

Table mfem::L2ProjectionGridTransfer::L2Projection::ho2lor
protected

Definition at line 197 of file transfer.hpp.


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