A class which applies a preconditioner repeatedly. The inherit assumption is that the preconditioner corresponds to a residual correction. More...

#include <Teko_IterativePreconditionerFactory.hpp>

Inheritance diagram for Teko::IterativePreconditionerFactory:

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Public Member Functions
	IterativePreconditionerFactory ()
	Default constructor, for use with the AutoClone class. More...

	IterativePreconditionerFactory (unsigned int correctionNum, const Teuchos::RCP< Teko::InverseFactory > &precFactory)

	IterativePreconditionerFactory (unsigned int correctionNum, const Teuchos::RCP< Teko::PreconditionerFactory > &precFactory)

virtual LinearOp	buildPreconditionerOperator (LinearOp &lo, PreconditionerState &state) const
	Function that is called to build the preconditioner for the linear operator that is passed in. More...

Methods for construction from a parameter list entry
virtual void	initializeFromParameterList (const Teuchos::ParameterList &settings)
	This function builds the internals of the preconditioner factory from a parameter list. More...

virtual Teuchos::RCP < Teuchos::ParameterList >	getRequestedParameters () const
	Request the additional parameters this preconditioner factory needs. More...

virtual bool	updateRequestedParameters (const Teuchos::ParameterList &pl)
	Update this object with the fields from a parameter list. More...

Public Member Functions inherited from Teko::PreconditionerFactory
virtual Teuchos::RCP < PreconditionerState >	buildPreconditionerState () const
	Function that permits the construction of an arbitrary PreconditionerState object. More...

void	setInverseLibrary (const Teuchos::RCP< const InverseLibrary > &il)
	Set the inverse library used by this preconditioner factory. More...

Teuchos::RCP< const InverseLibrary >	getInverseLibrary () const
	Get the inverse library used by this preconditioner factory. More...

void	setRequestHandler (const Teuchos::RCP< RequestHandler > &rh)
	Set the request handler with pointers to the appropriate callbacks. More...

Teuchos::RCP< RequestHandler >	getRequestHandler () const
	Get the request handler with pointers to the appropriate callbacks. More...

bool	isCompatible (const Thyra::LinearOpSourceBase< double > &fwdOpSrc) const
	is this operator compatiable with the preconditioner factory? More...

Teuchos::RCP < Thyra::PreconditionerBase < double > >	createPrec () const
	create an instance of the preconditioner More...

void	initializePrec (const Teuchos::RCP< const Thyra::LinearOpSourceBase< double > > &fwdOpSrc, const Teuchos::RCP< const Thyra::MultiVectorBase< double > > &solnVec, Thyra::PreconditionerBase< double > *precOp, const Thyra::ESupportSolveUse supportSolveUse) const
	initialize a newly created preconditioner object More...

void	initializePrec (const Teuchos::RCP< const Thyra::LinearOpSourceBase< double > > &fwdOpSrc, Thyra::PreconditionerBase< double > *precOp, const Thyra::ESupportSolveUse supportSolveUse) const
	initialize a newly created preconditioner object More...

void	uninitializePrec (Thyra::PreconditionerBase< double > prec, Teuchos::RCP< const Thyra::LinearOpSourceBase< double > > fwdOpSrc, Thyra::ESupportSolveUse *supportSolveUse) const
	wipe clean a already initialized preconditioner object More...

void	setParameterList (const Teuchos::RCP< Teuchos::ParameterList > &paramList)
	Set parameters from a parameter list and return with default values. More...

Teuchos::RCP < Teuchos::ParameterList >	getNonconstParameterList ()
	Get the parameter list that was set using setParameterList(). More...

Teuchos::RCP < Teuchos::ParameterList >	unsetParameterList ()
	Unset the parameter list that was set using setParameterList(). More...

Additional Inherited Members
Static Public Member Functions inherited from Teko::PreconditionerFactory
static Teuchos::RCP < PreconditionerFactory >	buildPreconditionerFactory (const std::string &name, const Teuchos::ParameterList &settings, const Teuchos::RCP< const InverseLibrary > &invLib=Teuchos::null)
	Builder function for creating preconditioner factories (yes this is a factory factory). More...

static void	addPreconditionerFactory (const std::string &name, const Teuchos::RCP< Cloneable > &clone)
	Add a preconditioner factory to the builder. This is done using the clone pattern. More...

static void	getPreconditionerFactoryNames (std::vector< std::string > &names)
	Get the names of the block preconditioner factories. More...

Protected Attributes inherited from Teko::PreconditionerFactory
Teuchos::RCP < Teuchos::ParameterList >	paramList_
	for ParameterListAcceptor More...

Teuchos::RCP< RequestHandler >	callbackHandler_
	For handling requests and send requests back to the user. More...

Detailed Description

A class which applies a preconditioner repeatedly. The inherit assumption is that the preconditioner corresponds to a residual correction.

A class which applies a preconditioner repeatedly. The inherit assumption is that the preconditioner corresponds to a residual correction. For a linear operator $A$ preconditioned by $P^{-1}$ the initial residual correction is

$e_0 = P^{-1} r_0.$

Now because the preconditioner approximates $A^{-1}$ we have $r_1 = r_0 - A e_0$ . This leads to the following residual correction scheme

$r_i = (I - A P^{-1})^i r_0.$

An additional application of the preconditioner will give the $i^{th}$ correction

$e_i = P^{-1} \sum_{j=0}^i r_j.$

This factory takes a preconditioner (or inverse) factory and constructs $P^{-1}$ , and then applies it, as outlined above, a user specified number of times.

Similar to the other preconditioner in Teko this class can be constructed through an XML file. For example:

<ParameterList name="Iterative Solve">
  <Parameter name="Type" type="string" value="Iterative Preconditioner"/>
  <Parameter name="Preconditioner Type" type="string" value="ML"/>
  <Parameter name="Iteration Count" type="int" value="3"/>
</ParameterList>

Definition at line 97 of file Teko_IterativePreconditionerFactory.hpp.

Constructor & Destructor Documentation

Teko::IterativePreconditionerFactory::IterativePreconditionerFactory ( )

Default constructor, for use with the AutoClone class.

Definition at line 55 of file Teko_IterativePreconditionerFactory.cpp.

Teko::IterativePreconditionerFactory::IterativePreconditionerFactory	(	unsigned int	correctionNum,
		const Teuchos::RCP< Teko::InverseFactory > &	precFactory
	)

Construct a preconditioner factory that applies a specified preconditioner, a fixed number of times.

Parameters

[in]	correctionNum	The correction number to be returned by the preconditioner operator. If the preconditioner is only applied once than `correctionNum=0` and is returned.
[in]	precFactory	Factory used to construct the preconditioner

Construct a preconditioner factory that applies a specified preconditioner, a fixed number of times.

Definition at line 62 of file Teko_IterativePreconditionerFactory.cpp.

Teko::IterativePreconditionerFactory::IterativePreconditionerFactory	(	unsigned int	correctionNum,
		const Teuchos::RCP< Teko::PreconditionerFactory > &	precFactory
	)

Construct a preconditioner factory that applies a specified preconditioner, a fixed number of times.

Parameters

[in]	correctionNum	The correction number to be returned by the preconditioner operator. If the preconditioner is only applied once than `correctionNum=0` and is returned.
[in]	precFactory	Factory used to construct the preconditioner

Construct a preconditioner factory that applies a specified preconditioner, a fixed number of times.

Definition at line 70 of file Teko_IterativePreconditionerFactory.cpp.

Member Function Documentation

LinearOp Teko::IterativePreconditionerFactory::buildPreconditionerOperator	(	LinearOp &	lo,
		PreconditionerState &	state
	)		const

virtual

Function that is called to build the preconditioner for the linear operator that is passed in.

This function builds a preconditioner based on the passed in LinearOp.

Parameters

[in]	lo	Source linear operator that is to be preconditioned.
[in]	state	An object associated with this operator to store the preconditioner state.

Returns: The preconditioner as a linear operator (i.e. to perform a matrix-vector operation simply call "apply").

Implements Teko::PreconditionerFactory.

Definition at line 81 of file Teko_IterativePreconditionerFactory.cpp.

void Teko::IterativePreconditionerFactory::initializeFromParameterList ( const Teuchos::ParameterList & settings )

virtual

This function builds the internals of the preconditioner factory from a parameter list.

This function builds the internals of the preconditioner factory from a parameter list. Furthermore, it allows a preconditioner factory developer to easily add a factory to the build system. This function is required for building a preconditioner from a parameter list.

Parameters

[in] settings Parmaeter list to use as the internal settings

Reimplemented from Teko::PreconditionerFactory.

Definition at line 113 of file Teko_IterativePreconditionerFactory.cpp.

Teuchos::RCP< Teuchos::ParameterList > Teko::IterativePreconditionerFactory::getRequestedParameters ( ) const

virtual

Request the additional parameters this preconditioner factory needs.

Request the additonal parameters needed by this preconditioner factory. The parameter list will have a set of fields that can be filled with the requested values. These fields include all requirements, even those of the sub-solvers if there are any. Once correctly filled the object can be updated by calling the updateRequestedParameters with the filled parameter list.

Returns: A parameter list with the requested parameters.

Reimplemented from Teko::PreconditionerFactory.

Definition at line 137 of file Teko_IterativePreconditionerFactory.cpp.

bool Teko::IterativePreconditionerFactory::updateRequestedParameters ( const Teuchos::ParameterList & pl )

virtual

Update this object with the fields from a parameter list.

Update the requested fields using a parameter list. This method is expected to pair with the getRequestedParameters method (i.e. the fields requested are going to be update using this method).

Parameters

[in] pl Parameter list containing the requested parameters.

Returns: If the method succeeded (found all its required parameters) this method returns true, otherwise it returns false.

Reimplemented from Teko::PreconditionerFactory.

Definition at line 148 of file Teko_IterativePreconditionerFactory.cpp.

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

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation