54#include "Teuchos_RefCountPtr.hpp"
187 const int MaxIters = 1550,
188 const double Tol = 1e-9,
205#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
263 virtual std::ostream&
Print(std::ostream& os)
const;
340 Teuchos::RefCountPtr<Epetra_RowMatrix>
A_;
342 Teuchos::RefCountPtr<Epetra_CrsMatrix>
U_;
343 Teuchos::RefCountPtr<Epetra_Vector>
D_;
Ifpack_CondestType
Ifpack_CondestType: enum to define the type of condition number estimate.
@ Ifpack_Cheap
cheap estimate
#define IFPACK_CHK_ERR(ifpack_err)
Ifpack_ScalingType enumerable type.
Ifpack_IC: A class for constructing and using an incomplete Cholesky factorization of a given Epetra_...
virtual double InitializeTime() const
Returns the time spent in Initialize().
virtual int NumApplyInverse() const
Returns the number of calls to ApplyInverse().
double GetRelativeThreshold()
Get relative threshold value.
long long NumGlobalNonzeros64() const
bool IsInitialized() const
Returns true if the preconditioner has been successfully initialized, false otherwise.
int NumMyNonzeros() const
Returns the number of nonzero entries in the local graph.
int Initialize()
Initialize L and U with values from user matrix A.
int SetParameters(Teuchos::ParameterList ¶meterlis)
Set parameters using a Teuchos::ParameterList object.
double NormInf() const
Returns 0.0 because this class cannot compute Inf-norm.
void SetAbsoluteThreshold(double Athresh)
Set absolute threshold value.
double LevelOfFill() const
int Apply(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
virtual int NumCompute() const
Returns the number of calls to Compute().
int Compute()
Compute IC factor U using the specified graph, diagonal perturbation thresholds and relaxation parame...
const Epetra_Comm & Comm_
bool UseTranspose() const
Returns the current UseTranspose setting.
Ifpack_IC(Epetra_RowMatrix *A)
Ifpack_IC constuctor with variable number of indices per row.
virtual double InitializeFlops() const
Returns the number of flops in the initialization phase.
virtual double ApplyInverseFlops() const
Returns the number of flops in the application of the preconditioner.
double Condest() const
Returns the computed condition number estimate, or -1.0 if not computed.
double InitializeTime_
Contains the time for all successful calls to Initialize().
int ApplyInverse(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
Returns the result of a Ifpack_IC forward/back solve on a Epetra_MultiVector X in Y.
void SetRelativeThreshold(double Rthresh)
Set relative threshold value.
int NumApplyInverse_
Contains the number of successful call to ApplyInverse().
double ComputeFlops_
Contains the number of flops for Compute().
Epetra_Time Time_
Used for timing purposes.
double DropTolerance() const
virtual int NumInitialize() const
Returns the number of calls to Initialize().
int NumGlobalNonzeros() const
Returns the number of nonzero entries in the global graph.
int SetParameter(const std::string, const double)
int SetUseTranspose(bool UseTranspose_in)
If set true, transpose of this operator will be applied.
const Epetra_Map & OperatorRangeMap() const
Returns the Epetra_Map object associated with the range of this operator.
const Epetra_CrsMatrix & U() const
Returns the address of the U factor associated with this factored matrix.
const Epetra_Map & OperatorDomainMap() const
Returns the Epetra_Map object associated with the domain of this operator.
double ApplyInverseFlops_
Contain sthe number of flops for ApplyInverse().
bool IsComputed() const
If factor is completed, this query returns true, otherwise it returns false.
double ComputeTime_
Contains the time for all successful calls to Compute().
Teuchos::RefCountPtr< Epetra_RowMatrix > A_
virtual ~Ifpack_IC()
Ifpack_IC Destructor.
const Epetra_RowMatrix & Matrix() const
Returns a pointer to the matrix to be preconditioned.
double GetAbsoluteThreshold()
Get absolute threshold value.
virtual double ComputeFlops() const
Returns the number of flops in the computation phase.
bool HasNormInf() const
Returns false because this class cannot compute an Inf-norm.
const Epetra_Comm & Comm() const
Returns the Epetra_BlockMap object associated with the range of this matrix operator.
virtual double ApplyInverseTime() const
Returns the time spent in ApplyInverse().
Epetra_RowMatrix & Matrix()
Teuchos::RefCountPtr< Epetra_Vector > D_
const char * Label() const
double ApplyInverseTime_
Contains the time for all successful calls to ApplyInverse().
virtual std::ostream & Print(std::ostream &os) const
Prints basic information on iostream. This function is used by operator<<.
double RelativeThreshold() const
int SetParameter(const std::string, const int)
const Epetra_Vector & D() const
Returns the address of the D factor associated with this factored matrix.
int NumInitialize_
Contains the number of successful calls to Initialize().
Teuchos::RefCountPtr< Epetra_CrsMatrix > U_
virtual double ComputeTime() const
Returns the time spent in Compute().
int SetLabel(const char *Label_in)
int NumCompute_
Contains the number of successful call to Compute().
double AbsoluteThreshold() const
Ifpack_Preconditioner: basic class for preconditioning in Ifpack.