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Belos::TFQMRIter< ScalarType, MV, OP > Class Template Reference

This class implements the preconditioned transpose-free QMR algorithm for solving non-Hermitian linear systems of equations Ax = b, where b is the right-hand side vector and x is the corresponding solution. More...

#include <BelosTFQMRIter.hpp>

Inheritance diagram for Belos::TFQMRIter< ScalarType, MV, OP >:
Inheritance graph
[legend]

Public Types

typedef MultiVecTraits
< ScalarType, MV > 
MVT
 
typedef OperatorTraits
< ScalarType, MV, OP > 
OPT
 
typedef Teuchos::ScalarTraits
< ScalarType > 
SCT
 
typedef SCT::magnitudeType MagnitudeType
 

Public Member Functions

Constructor/Destructor.
 TFQMRIter (const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &problem, const Teuchos::RCP< OutputManager< ScalarType > > &printer, const Teuchos::RCP< StatusTest< ScalarType, MV, OP > > &tester, Teuchos::ParameterList &params)
 Belos::TFQMRIter constructor. More...
 
virtual ~TFQMRIter ()
 Belos::TFQMRIter destructor. More...
 
Solver methods
void iterate ()
 This method performs TFQMR iterations until the status test indicates the need to stop or an error occurs (in which case, an std::exception is thrown). More...
 
void initializeTFQMR (const TFQMRIterState< ScalarType, MV > &newstate)
 Initialize the solver to an iterate, providing a complete state. More...
 
void initialize ()
 Initialize the solver with the initial vectors from the linear problem or random data. More...
 
TFQMRIterState< ScalarType, MV > getState () const
 Get the current state of the linear solver. More...
 
Status methods
int getNumIters () const
 Get the current iteration count. More...
 
void resetNumIters (int iter=0)
 Reset the iteration count. More...
 
Teuchos::RCP< const MV > getNativeResiduals (std::vector< MagnitudeType > *norms) const
 Get the norms of the residuals native to the solver. More...
 
Teuchos::RCP< MV > getCurrentUpdate () const
 Get the current update to the linear system. More...
 
Accessor methods
const LinearProblem
< ScalarType, MV, OP > & 
getProblem () const
 Get a constant reference to the linear problem. More...
 
int getBlockSize () const
 Get the blocksize to be used by the iterative solver in solving this linear problem. More...
 
void setBlockSize (int blockSize)
 Set the blocksize. More...
 
bool isInitialized ()
 States whether the solver has been initialized or not. More...
 
- Public Member Functions inherited from Belos::Iteration< ScalarType, MV, OP >
 Iteration ()
 Default Constructor. More...
 
virtual ~Iteration ()
 Destructor. More...
 
virtual Teuchos::RCP< const MV > getNativeResiduals (std::vector< typename Teuchos::ScalarTraits< ScalarType >::magnitudeType > *norms) const =0
 Get the residuals native to the solver. More...
 

Detailed Description

template<class ScalarType, class MV, class OP>
class Belos::TFQMRIter< ScalarType, MV, OP >

This class implements the preconditioned transpose-free QMR algorithm for solving non-Hermitian linear systems of equations Ax = b, where b is the right-hand side vector and x is the corresponding solution.

Author
Heidi Thornquist

Definition at line 95 of file BelosTFQMRIter.hpp.

Member Typedef Documentation

template<class ScalarType , class MV , class OP >
typedef MultiVecTraits<ScalarType,MV> Belos::TFQMRIter< ScalarType, MV, OP >::MVT

Definition at line 100 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
typedef OperatorTraits<ScalarType,MV,OP> Belos::TFQMRIter< ScalarType, MV, OP >::OPT

Definition at line 101 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
typedef Teuchos::ScalarTraits<ScalarType> Belos::TFQMRIter< ScalarType, MV, OP >::SCT

Definition at line 102 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
typedef SCT::magnitudeType Belos::TFQMRIter< ScalarType, MV, OP >::MagnitudeType

Definition at line 103 of file BelosTFQMRIter.hpp.

Constructor & Destructor Documentation

template<class ScalarType , class MV , class OP >
Belos::TFQMRIter< ScalarType, MV, OP >::TFQMRIter ( const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &  problem,
const Teuchos::RCP< OutputManager< ScalarType > > &  printer,
const Teuchos::RCP< StatusTest< ScalarType, MV, OP > > &  tester,
Teuchos::ParameterList params 
)

Belos::TFQMRIter constructor.

Definition at line 291 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
virtual Belos::TFQMRIter< ScalarType, MV, OP >::~TFQMRIter ( )
inlinevirtual

Belos::TFQMRIter destructor.

Definition at line 115 of file BelosTFQMRIter.hpp.

Member Function Documentation

template<class ScalarType , class MV , class OP >
void Belos::TFQMRIter< ScalarType, MV, OP >::iterate ( )
virtual

This method performs TFQMR iterations until the status test indicates the need to stop or an error occurs (in which case, an std::exception is thrown).

iterate() will first determine whether the solver is initialized; if not, it will call initialize() using default arguments. After initialization, the solver performs TFQMR iterations until the status test evaluates as Passed, at which point the method returns to the caller.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 426 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::TFQMRIter< ScalarType, MV, OP >::initializeTFQMR ( const TFQMRIterState< ScalarType, MV > &  newstate)

Initialize the solver to an iterate, providing a complete state.

The TFQMRIter contains a certain amount of state, consisting of the current Krylov basis and the associated Hessenberg matrix.

initialize() gives the user the opportunity to manually set these, although this must be done with caution, abiding by the rules given below. All notions of orthogonality and orthonormality are derived from the inner product specified by the orthogonalization manager.

Postcondition
isInitialized() == true (see post-conditions of isInitialize())

The user has the option of specifying any component of the state using initialize(). However, these arguments are assumed to match the post-conditions specified under isInitialized(). Any necessary component of the state not given to initialize() will be generated.

Note
For any pointer in newstate which directly points to the multivectors in the solver, the data is not copied.

Definition at line 363 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::TFQMRIter< ScalarType, MV, OP >::initialize ( )
inlinevirtual

Initialize the solver with the initial vectors from the linear problem or random data.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 160 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
TFQMRIterState<ScalarType,MV> Belos::TFQMRIter< ScalarType, MV, OP >::getState ( ) const
inline

Get the current state of the linear solver.

The data is only valid if isInitialized() == true.

Returns
A TFQMRIterState object containing const pointers to the current solver state.

Definition at line 173 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::TFQMRIter< ScalarType, MV, OP >::getNumIters ( ) const
inlinevirtual

Get the current iteration count.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 192 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::TFQMRIter< ScalarType, MV, OP >::resetNumIters ( int  iter = 0)
inlinevirtual

Reset the iteration count.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 195 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP< const MV > Belos::TFQMRIter< ScalarType, MV, OP >::getNativeResiduals ( std::vector< MagnitudeType > *  norms) const

Get the norms of the residuals native to the solver.

Returns
A std::vector of length blockSize containing the native residuals.

Definition at line 315 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::TFQMRIter< ScalarType, MV, OP >::getCurrentUpdate ( ) const
inlinevirtual

Get the current update to the linear system.

Note
This method returns the accumulated update to the solution instead of updating the linear problem, since it may incur an additional preconditioner application each iteration.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 205 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
const LinearProblem<ScalarType,MV,OP>& Belos::TFQMRIter< ScalarType, MV, OP >::getProblem ( ) const
inlinevirtual

Get a constant reference to the linear problem.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 214 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::TFQMRIter< ScalarType, MV, OP >::getBlockSize ( ) const
inlinevirtual

Get the blocksize to be used by the iterative solver in solving this linear problem.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 217 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::TFQMRIter< ScalarType, MV, OP >::setBlockSize ( int  blockSize)
inlinevirtual

Set the blocksize.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 220 of file BelosTFQMRIter.hpp.

template<class ScalarType , class MV , class OP >
bool Belos::TFQMRIter< ScalarType, MV, OP >::isInitialized ( )
inlinevirtual

States whether the solver has been initialized or not.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 226 of file BelosTFQMRIter.hpp.


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

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