Ifpack_Polynomial: class for preconditioning with least squares polynomials in Ifpack. More...
#include <Ifpack_Polynomial.h>
Public Member Functions | |
virtual int | SetUseTranspose (bool UseTranspose_in) |
Ifpack_Polynomial (const Epetra_Operator *Matrix) | |
Ifpack_Polynomial constructor with given Epetra_Operator/Epetra_RowMatrix. More... | |
Ifpack_Polynomial (const Epetra_RowMatrix *Matrix) | |
Ifpack_Polynomial constructor with given Epetra_Operator/Epetra_RowMatrix. More... | |
virtual | ~Ifpack_Polynomial () |
Destructor. | |
virtual int | Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const |
Applies the matrix to an Epetra_MultiVector. More... | |
virtual int | ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const |
Applies the preconditioner to X, returns the result in Y. More... | |
virtual double | NormInf () const |
Returns the infinity norm of the global matrix (not implemented) | |
virtual const char * | Label () const |
virtual bool | UseTranspose () const |
Returns the current UseTranspose setting. | |
virtual bool | HasNormInf () const |
Returns true if the this object can provide an approximate Inf-norm, false otherwise. | |
virtual const Epetra_Comm & | Comm () const |
Returns a pointer to the Epetra_Comm communicator associated with this operator. | |
virtual const Epetra_Map & | OperatorDomainMap () const |
Returns the Epetra_Map object associated with the domain of this operator. | |
virtual const Epetra_Map & | OperatorRangeMap () const |
Returns the Epetra_Map object associated with the range of this operator. | |
virtual int | Initialize () |
Computes all it is necessary to initialize the preconditioner. | |
virtual bool | IsInitialized () const |
Returns true if the preconditioner has been successfully initialized, false otherwise. | |
virtual bool | IsComputed () const |
Returns true if the preconditioner has been successfully computed. | |
virtual int | Compute () |
Computes the preconditioners. | |
virtual const Epetra_RowMatrix & | Matrix () const |
Returns a pointer to the matrix to be preconditioned. | |
virtual double | Condest (const Ifpack_CondestType CT=Ifpack_Cheap, const int MaxIters=1550, const double Tol=1e-9, Epetra_RowMatrix *Matrix_in=0) |
Computes the condition number estimates and returns the value. | |
virtual double | Condest () const |
Returns the condition number estimate, or -1.0 if not computed. | |
virtual int | SetParameters (Teuchos::ParameterList &List) |
Sets all the parameters for the preconditioner. | |
virtual std::ostream & | Print (std::ostream &os) const |
Prints object to an output stream. | |
virtual int | NumInitialize () const |
Returns the number of calls to Initialize(). | |
virtual int | NumCompute () const |
Returns the number of calls to Compute(). | |
virtual int | NumApplyInverse () const |
Returns the number of calls to ApplyInverse(). | |
virtual double | InitializeTime () const |
Returns the time spent in Initialize(). | |
virtual double | ComputeTime () const |
Returns the time spent in Compute(). | |
virtual double | ApplyInverseTime () const |
Returns the time spent in ApplyInverse(). | |
virtual double | InitializeFlops () const |
Returns the number of flops in the initialization phase. | |
virtual double | ComputeFlops () const |
Returns the number of flops in the computation phase. | |
virtual double | ApplyInverseFlops () const |
Returns the number of flops for the application of the preconditioner. | |
int | GMRES (const Epetra_Operator &Operator, const Epetra_Vector &InvPointDiagonal, const int MaximumIterations, double &lambda_real_min, double &lambda_real_max, double &lambda_imag_min, double &lambda_imag_max) |
Uses AztecOO's GMRES to estimate the height and width of the spectrum. | |
static int | PowerMethod (const Epetra_Operator &Operator, const Epetra_Vector &InvPointDiagonal, const int MaximumIterations, double &LambdaMax) |
Simple power method to compute lambda_max. | |
static int | CG (const Epetra_Operator &Operator, const Epetra_Vector &InvPointDiagonal, const int MaximumIterations, double &lambda_min, double &lambda_max) |
Uses AztecOO's CG to estimate lambda_min and lambda_max. | |
Ifpack_Polynomial: class for preconditioning with least squares polynomials in Ifpack.
The Ifpack_Polynomial class enables the construction of preconditioners based on least squares polynomials for an Epetra_RowMatrix. Similar to Ifpack_Chebyshev, Ifpack_Polynomial is designed for indefinite linear systems.
The list of parameters is
Definition at line 99 of file Ifpack_Polynomial.h.
Ifpack_Polynomial::Ifpack_Polynomial | ( | const Epetra_Operator * | Matrix | ) |
Ifpack_Polynomial constructor with given Epetra_Operator/Epetra_RowMatrix.
Creates an instance of Ifpack_Polynomial class.
Matrix | - (In) Pointer to the operator to precondition. |
Definition at line 86 of file Ifpack_Polynomial.cpp.
Ifpack_Polynomial::Ifpack_Polynomial | ( | const Epetra_RowMatrix * | Matrix | ) |
Ifpack_Polynomial constructor with given Epetra_Operator/Epetra_RowMatrix.
Creates an instance of Ifpack_Polynomial class.
Matrix | - (In) Pointer to the matrix to precondition. |
Definition at line 135 of file Ifpack_Polynomial.cpp.
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inlinevirtual |
Applies the matrix to an Epetra_MultiVector.
X | - (In) A Epetra_MultiVector of dimension NumVectors to multiply with matrix. |
Y | - (Out) A Epetra_MultiVector of dimension NumVectors containing the result. |
Implements Epetra_Operator.
Definition at line 252 of file Ifpack_Polynomial.cpp.
References IsComputed(), and UseTranspose().
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virtual |
Applies the preconditioner to X, returns the result in Y.
X | - (In) A Epetra_MultiVector of dimension NumVectors to be preconditioned. |
Y | - (InOut) A Epetra_MultiVector of dimension NumVectors containing result. |
Implements Ifpack_Preconditioner.
Definition at line 628 of file Ifpack_Polynomial.cpp.
References IsComputed().
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inlinevirtual |
This flag can be used to apply the preconditioner to the transpose of the input operator.
Implements Epetra_Operator.
Definition at line 131 of file Ifpack_Polynomial.h.