MFEM  v3.3.2 Finite element discretization library
mfem::TripleProductOperator Class Reference

General triple product operator x -> A*B*C*x, with ownership of the factors. More...

#include <operator.hpp>

Inheritance diagram for mfem::TripleProductOperator:
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Collaboration diagram for mfem::TripleProductOperator:
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## Public Member Functions

TripleProductOperator (Operator *A, Operator *B, Operator *C, bool ownA, bool ownB, bool ownC)

virtual void Mult (const Vector &x, Vector &y) const
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 ~TripleProductOperator ()

Public Member Functions inherited from mfem::Operator
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 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...

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...

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(). More...

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

virtual ~Operator ()
Virtual destructor. More...

## Additional Inherited Members

Public Types inherited from mfem::Operator
enum  Type {
MFEM_SPARSEMAT, Hypre_ParCSR, PETSC_MATAIJ, PETSC_MATIS,
PETSC_MATSHELL, PETSC_MATNEST, PETSC_MATHYPRE, PETSC_MATGENERIC
}
Enumeration defining IDs for some classes derived from Operator. 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...

## Detailed Description

General triple product operator x -> A*B*C*x, with ownership of the factors.

Definition at line 346 of file operator.hpp.

## Constructor & Destructor Documentation

 mfem::TripleProductOperator::TripleProductOperator ( Operator * A, Operator * B, Operator * C, bool ownA, bool ownB, bool ownC )
inline

Definition at line 355 of file operator.hpp.

 virtual mfem::TripleProductOperator::~TripleProductOperator ( )
inlinevirtual

Definition at line 369 of file operator.hpp.

## Member Function Documentation

 virtual void mfem::TripleProductOperator::Mult ( const Vector & x, Vector & y ) const
inlinevirtual

Operator application: y=A(x).

Implements mfem::Operator.

Definition at line 363 of file operator.hpp.

 virtual void mfem::TripleProductOperator::MultTranspose ( const Vector & x, Vector & y ) const
inlinevirtual

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 366 of file operator.hpp.

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