50#include "Epetra_Vector.h"
51#include "Epetra_CrsMatrix.h"
52#include "Epetra_Time.h"
53#include "Teuchos_RefCountPtr.hpp"
149 const int MaxIters = 1550,
150 const double Tol = 1e-9,
214 virtual std::ostream&
Print(std::ostream& os)
const;
296#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
330 template<
typename int_type>
344 Teuchos::RefCountPtr<Epetra_CrsMatrix>
L_;
346 Teuchos::RefCountPtr<Epetra_CrsMatrix>
U_;
Ifpack_CondestType
Ifpack_CondestType: enum to define the type of condition number estimate.
@ Ifpack_Cheap
cheap estimate
Ifpack_ScalingType enumerable type.
virtual const Epetra_Map & OperatorDomainMap() const=0
virtual const Epetra_Map & OperatorRangeMap() const=0
Ifpack_ILUT: A class for constructing and using an incomplete LU factorization of a given Epetra_RowM...
int NumGlobalNonzeros() const
Returns the number of nonzero entries in the global graph.
int Compute()
Compute IC factor U using the specified graph, diagonal perturbation thresholds and relaxation parame...
double RelativeThreshold() const
Get relative threshold value.
int SetParameters(Teuchos::ParameterList ¶meterlis)
Set parameters using a Teuchos::ParameterList object.
double LevelOfFill_
Level-of-fill.
double Condest() const
Returns the computed estimated condition number, or -1.0 if no computed.
bool IsInitialized_
true if this object has been initialized
double Athresh_
Absolute threshold.
int Apply(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
virtual double InitializeTime() const
Returns the time spent in Initialize().
double DropTolerance() const
Gets the dropping tolerance.
const Epetra_RowMatrix & A_
reference to the matrix to be preconditioned.
int NumApplyInverse_
Contains the number of successful call to ApplyInverse().
const Epetra_Comm & Comm_
Reference to the communicator object.
double NormInf() const
Returns 0.0 because this class cannot compute Inf-norm.
int ApplyInverse(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
Returns the result of a Ifpack_ILUT forward/back solve on a Epetra_MultiVector X in Y.
int SetLabel(const char *Label_in)
Sets the label for this object.
double RelaxValue() const
Set relative threshold value.
Ifpack_ILUT(const Ifpack_ILUT &RHS)
Copy constructor (should never be used)
virtual int NumCompute() const
Returns the number of calls to Compute().
Teuchos::RefCountPtr< Epetra_Map > SerialMap_
const Epetra_CrsMatrix & L() const
Returns a reference to the L factor.
const Epetra_CrsMatrix & U() const
Returns a reference to the U factor.
virtual int NumApplyInverse() const
Returns the number of calls to ApplyInverse().
Teuchos::RefCountPtr< Epetra_SerialComm > SerialComm_
double DropTolerance_
Discards all elements below this tolerance.
double ApplyInverseFlops_
Contain sthe number of flops for ApplyInverse().
virtual std::ostream & Print(std::ostream &os) const
Prints basic information on iostream. This function is used by operator<<.
bool IsInitialized() const
Returns true if the preconditioner has been successfully initialized.
const char * Label() const
Returns the label of this object.
bool HasNormInf() const
Returns false because this class cannot compute an Inf-norm.
virtual double ComputeFlops() const
Returns the number of flops in the computation phase.
Teuchos::RefCountPtr< Epetra_CrsMatrix > U_
U factor.
long long NumGlobalNonzeros64() const
double ComputeTime_
Contains the time for all successful calls to Compute().
virtual int NumInitialize() const
Returns the number of calls to Initialize().
int NumMyRows_
Number of local rows.
double ApplyInverseTime_
Contains the time for all successful calls to ApplyInverse().
int Initialize()
Initialize L and U with values from user matrix A.
virtual double ComputeTime() const
Returns the time spent in Compute().
const Epetra_Comm & Comm() const
Returns the Epetra_BlockMap object associated with the range of this matrix operator.
void Destroy()
Releases all allocated memory.
virtual ~Ifpack_ILUT()
Ifpack_ILUT Destructor.
double ComputeFlops_
Contains the number of flops for Compute().
double Relax_
relaxation value
int SetUseTranspose(bool UseTranspose_in)
If set true, transpose of this operator will be applied.
int NumInitialize_
Contains the number of successful calls to Initialize().
virtual double ApplyInverseTime() const
Returns the time spent in ApplyInverse().
double Condest_
Condition number estimate.
double InitializeTime_
Contains the time for all successful calls to Initialize().
Ifpack_ILUT & operator=(const Ifpack_ILUT &)
operator= (should never be used)
int NumCompute_
Contains the number of successful call to Compute().
int NumMyNonzeros() const
Returns the number of nonzero entries in the local graph.
bool IsComputed() const
If factor is completed, this query returns true, otherwise it returns false.
const Epetra_Map & OperatorRangeMap() const
Returns the Epetra_Map object associated with the range of this operator.
long long GlobalNonzeros_
Global number of nonzeros in L and U factors.
double LevelOfFill() const
virtual double InitializeFlops() const
Returns the number of flops in the initialization phase.
bool UseTranspose() const
Returns the current UseTranspose setting.
Epetra_Time Time_
Used for timing purposed.
double Rthresh_
Relative threshold.
bool IsComputed_
true if this object has been computed
virtual double ApplyInverseFlops() const
Returns the number of flops in the application of the preconditioner.
Teuchos::RefCountPtr< Epetra_CrsMatrix > L_
L factor.
const Epetra_RowMatrix & Matrix() const
Returns a reference to the matrix to be preconditioned.
const Epetra_Map & OperatorDomainMap() const
Returns the Epetra_Map object associated with the domain of this operator.
bool UseTranspose_
true if transpose has to be used.
std::string Label_
Label for this object.
double AbsoluteThreshold() const
Get absolute threshold value.
Ifpack_Preconditioner: basic class for preconditioning in Ifpack.