50 #include "Epetra_Vector.h" 51 #include "Epetra_CrsMatrix.h" 52 #include "Epetra_Time.h" 53 #include "Teuchos_RefCountPtr.hpp" 55 class Epetra_RowMatrix;
56 class Epetra_SerialComm;
59 class Epetra_MultiVector;
143 int ApplyInverse(
const Epetra_MultiVector& X, Epetra_MultiVector& Y)
const;
145 int Apply(
const Epetra_MultiVector& X, Epetra_MultiVector& Y)
const;
149 const int MaxIters = 1550,
150 const double Tol = 1e-9,
151 Epetra_RowMatrix* Matrix_in = 0);
196 const Epetra_CrsMatrix &
L()
const {
return(*
L_);};
199 const Epetra_CrsMatrix &
U()
const {
return(*
U_);};
215 virtual std::ostream&
Print(std::ostream& os)
const;
297 #ifndef EPETRA_NO_32BIT_GLOBAL_INDICES 331 template<
typename int_type>
341 const Epetra_RowMatrix&
A_;
345 Teuchos::RefCountPtr<Epetra_CrsMatrix>
L_;
347 Teuchos::RefCountPtr<Epetra_CrsMatrix>
U_;
const Epetra_Map & OperatorRangeMap() const
Returns the Epetra_Map object associated with the range of this operator.
double AbsoluteThreshold() const
Get absolute threshold value.
double RelaxValue() const
Set relative threshold value.
double DropTolerance() const
Gets the dropping tolerance.
Teuchos::RefCountPtr< Epetra_CrsMatrix > U_
U factor.
virtual int NumInitialize() const
Returns the number of calls to Initialize().
double RelativeThreshold() const
Get relative threshold value.
const Epetra_Map & OperatorDomainMap() const
Returns the Epetra_Map object associated with the domain of this operator.
bool IsInitialized() const
Returns true if the preconditioner has been successfully initialized.
double DropTolerance_
Discards all elements below this tolerance.
Teuchos::RefCountPtr< Epetra_Map > SerialMap_
Teuchos::RefCountPtr< Epetra_CrsMatrix > L_
L factor.
int Apply(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
const Epetra_CrsMatrix & L() const
Returns a reference to the L factor.
bool IsInitialized_
true if this object has been initialized
Ifpack_ILUT(const Epetra_RowMatrix *A)
Ifpack_ILUT constuctor with variable number of indices per row.
bool UseTranspose() const
Returns the current UseTranspose setting.
long long GlobalNonzeros_
Global number of nonzeros in L and U factors.
virtual double ApplyInverseTime() const
Returns the time spent in ApplyInverse().
long long NumGlobalNonzeros64() const
virtual double InitializeFlops() const
Returns the number of flops in the initialization phase.
int SetParameters(Teuchos::ParameterList ¶meterlis)
Set parameters using a Teuchos::ParameterList object.
const Epetra_Comm & Comm_
Reference to the communicator object.
double NormInf() const
Returns 0.0 because this class cannot compute Inf-norm.
int Initialize()
Initialize L and U with values from user matrix A.
virtual ~Ifpack_ILUT()
Ifpack_ILUT Destructor.
bool IsComputed() const
If factor is completed, this query returns true, otherwise it returns false.
Ifpack_CondestType
Ifpack_CondestType: enum to define the type of condition number estimate.
Ifpack_ILUT(const Ifpack_ILUT &RHS)
Copy constructor (should never be used)
bool UseTranspose_
true if transpose has to be used.
double Condest_
Condition number estimate.
int NumInitialize_
Contains the number of successful calls to Initialize().
Ifpack_ScalingType enumerable type.
std::string Label_
Label for this object.
Ifpack_Preconditioner: basic class for preconditioning in Ifpack.
virtual std::ostream & Print(std::ostream &os) const
Prints basic information on iostream. This function is used by operator<<.
Teuchos::RefCountPtr< Epetra_SerialComm > SerialComm_
int Compute()
Compute IC factor U using the specified graph, diagonal perturbation thresholds and relaxation parame...
bool HasNormInf() const
Returns false because this class cannot compute an Inf-norm.
const Epetra_RowMatrix & Matrix() const
Returns a reference to the matrix to be preconditioned.
double ComputeTime_
Contains the time for all successful calls to Compute().
virtual double InitializeTime() const
Returns the time spent in Initialize().
virtual double ApplyInverseFlops() const
Returns the number of flops in the application of the preconditioner.
const Epetra_RowMatrix & A_
reference to the matrix to be preconditioned.
int SetUseTranspose(bool UseTranspose_in)
If set true, transpose of this operator will be applied.
virtual int NumCompute() const
Returns the number of calls to Compute().
bool IsComputed_
true if this object has been computed
int NumGlobalNonzeros() const
Returns the number of nonzero entries in the global graph.
double ApplyInverseTime_
Contains the time for all successful calls to ApplyInverse().
double LevelOfFill_
Level-of-fill.
virtual int NumApplyInverse() const
Returns the number of calls to ApplyInverse().
const Epetra_CrsMatrix & U() const
Returns a reference to the U factor.
const char * Label() const
Returns the label of this object.
void Destroy()
Releases all allocated memory.
double Condest() const
Returns the computed estimated condition number, or -1.0 if no computed.
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 NumApplyInverse_
Contains the number of successful call to ApplyInverse().
double ComputeFlops_
Contains the number of flops for Compute().
double LevelOfFill() const
int NumMyNonzeros() const
Returns the number of nonzero entries in the local graph.
double ApplyInverseFlops_
Contain sthe number of flops for ApplyInverse().
double Rthresh_
Relative threshold.
Ifpack_ILUT: A class for constructing and using an incomplete LU factorization of a given Epetra_RowM...
const Epetra_Comm & Comm() const
Returns the Epetra_BlockMap object associated with the range of this matrix operator.
double InitializeTime_
Contains the time for all successful calls to Initialize().
int NumCompute_
Contains the number of successful call to Compute().
Epetra_Time Time_
Used for timing purposed.
int NumMyRows_
Number of local rows.
double Athresh_
Absolute threshold.
virtual double ComputeFlops() const
Returns the number of flops in the computation phase.
virtual double ComputeTime() const
Returns the time spent in Compute().
double Relax_
relaxation value
int SetLabel(const char *Label_in)
Sets the label for this object.
Ifpack_ILUT & operator=(const Ifpack_ILUT &RHS)
operator= (should never be used)