NumLib::ConvergenceCriterion Class Reference

Detailed Description

Convergence criterion for iterative algorithms, like nonlinear solvers.

It is able to check the difference of the solution vector between iterations and the residual of the equation being solved (e.g. the nonlinear equation system).

Definition at line 31 of file ConvergenceCriterion.h.

#include <ConvergenceCriterion.h>

Inheritance diagram for NumLib::ConvergenceCriterion:

Public Member Functions
	ConvergenceCriterion (const MathLib::VecNormType norm_type)
virtual bool	hasDeltaXCheck () const =0
virtual bool	hasResidualCheck () const =0
virtual void	checkDeltaX (GlobalVector const &minus_delta_x, GlobalVector const &x)=0
virtual void	checkResidual (GlobalVector const &residual)=0
	Check if the residual satisfies the convergence criterion.
virtual void	preFirstIteration ()
virtual void	setNoFirstIteration ()
virtual void	reset ()
virtual bool	isSatisfied () const
	Tell if the convergence criterion is satisfied.
MathLib::VecNormType	getVectorNormType () const
virtual	~ConvergenceCriterion ()=default

Protected Attributes
bool	_satisfied = true
bool	_is_first_iteration = true
const MathLib::VecNormType	_norm_type

Constructor & Destructor Documentation

ConvergenceCriterion()

NumLib::ConvergenceCriterion::ConvergenceCriterion ( const MathLib::VecNormType norm_type )

inlineexplicit

Definition at line 34 of file ConvergenceCriterion.h.

        : _norm_type(norm_type)
    {
    }

~ConvergenceCriterion()

virtual NumLib::ConvergenceCriterion::~ConvergenceCriterion ( )

virtualdefault

Member Function Documentation

checkDeltaX()

virtual void NumLib::ConvergenceCriterion::checkDeltaX ( GlobalVector const & minus_delta_x, GlobalVector const & x )

pure virtual

Check if the change of the solution between iterations satisfies the convergence criterion.

Parameters

minus_delta_x	the current solution update
x	the new solution from the current iteration

Remarks

The Newton-Raphson solver computes minus_delta_x. x is needed for relative tolerances.

Implemented in NumLib::ConvergenceCriterionDeltaX, NumLib::ConvergenceCriterionPerComponentDeltaX, NumLib::ConvergenceCriterionPerComponentResidual, and NumLib::ConvergenceCriterionResidual.

checkResidual()

virtual void NumLib::ConvergenceCriterion::checkResidual ( GlobalVector const & residual )

pure virtual

Check if the residual satisfies the convergence criterion.

Implemented in NumLib::ConvergenceCriterionDeltaX, NumLib::ConvergenceCriterionPerComponentDeltaX, NumLib::ConvergenceCriterionPerComponentResidual, and NumLib::ConvergenceCriterionResidual.

getVectorNormType()

MathLib::VecNormType NumLib::ConvergenceCriterion::getVectorNormType ( ) const

inline

Definition at line 92 of file ConvergenceCriterion.h.

{ return _norm_type; }

References _norm_type.

hasDeltaXCheck()

virtual bool NumLib::ConvergenceCriterion::hasDeltaXCheck ( ) const

pure virtual

Tells if the change of the solution between iterations is checked.

Remarks

This method allows to save some computations if no such check will be done.

Implemented in NumLib::ConvergenceCriterionDeltaX, NumLib::ConvergenceCriterionPerComponentDeltaX, NumLib::ConvergenceCriterionPerComponentResidual, and NumLib::ConvergenceCriterionResidual.

hasResidualCheck()

virtual bool NumLib::ConvergenceCriterion::hasResidualCheck ( ) const

pure virtual

Tells if the residual is checked.

Remarks

This method allows to save some computations if no such check will be done.

Implemented in NumLib::ConvergenceCriterionDeltaX, NumLib::ConvergenceCriterionPerComponentDeltaX, NumLib::ConvergenceCriterionPerComponentResidual, and NumLib::ConvergenceCriterionResidual.

isSatisfied()

virtual bool NumLib::ConvergenceCriterion::isSatisfied ( ) const

inlinevirtual

Tell if the convergence criterion is satisfied.

Definition at line 90 of file ConvergenceCriterion.h.

{ return _satisfied; };

References _satisfied.

preFirstIteration()

virtual void NumLib::ConvergenceCriterion::preFirstIteration ( )

inlinevirtual

Tell the ConvergenceCriterion that it is called for the first time now (while solving a specific nonlinear system).

Definition at line 70 of file ConvergenceCriterion.h.

{ _is_first_iteration = true; }

References _is_first_iteration.

reset()

virtual void NumLib::ConvergenceCriterion::reset ( )

inlinevirtual

Indicate that a new iteration now starts.

A concrete implementation of ConvergenceCriterion might want to check both delta x and the residual. I.e., in a new iteration both checks have to be done anew. This method will make the ConvergenceCriterion forget the result of all checks already done, s.t. all necessary checks will have to be repeated in order to satisfy the ConvergenceCriterion.

Reimplemented in NumLib::ConvergenceCriterionDeltaX, and NumLib::ConvergenceCriterionPerComponentDeltaX.

Definition at line 83 of file ConvergenceCriterion.h.

    {
        _satisfied = true;
        _is_first_iteration = false;
    };

References _is_first_iteration, and _satisfied.

setNoFirstIteration()

virtual void NumLib::ConvergenceCriterion::setNoFirstIteration ( )

inlinevirtual

Tell the ConvergenceCriterion that it is not called for the first time (while solving a coupling system).

Definition at line 74 of file ConvergenceCriterion.h.

{ _is_first_iteration = false; }

References _is_first_iteration.

Member Data Documentation

_is_first_iteration

bool NumLib::ConvergenceCriterion::_is_first_iteration = true

protected

Definition at line 98 of file ConvergenceCriterion.h.

Referenced by NumLib::ConvergenceCriterionPerComponentResidual::checkResidual(), NumLib::ConvergenceCriterionResidual::checkResidual(), preFirstIteration(), reset(), and setNoFirstIteration().

_norm_type

const MathLib::VecNormType NumLib::ConvergenceCriterion::_norm_type

protected

Definition at line 99 of file ConvergenceCriterion.h.

Referenced by NumLib::ConvergenceCriterionDeltaX::checkDeltaX(), NumLib::ConvergenceCriterionPerComponentDeltaX::checkDeltaX(), NumLib::ConvergenceCriterionPerComponentResidual::checkDeltaX(), NumLib::ConvergenceCriterionResidual::checkDeltaX(), NumLib::ConvergenceCriterionPerComponentResidual::checkResidual(), NumLib::ConvergenceCriterionResidual::checkResidual(), and getVectorNormType().

_satisfied

bool NumLib::ConvergenceCriterion::_satisfied = true

protected

Definition at line 97 of file ConvergenceCriterion.h.

Referenced by NumLib::ConvergenceCriterionDeltaX::checkDeltaX(), NumLib::ConvergenceCriterionPerComponentDeltaX::checkDeltaX(), NumLib::ConvergenceCriterionPerComponentResidual::checkResidual(), NumLib::ConvergenceCriterionResidual::checkResidual(), isSatisfied(), reset(), NumLib::ConvergenceCriterionDeltaX::reset(), and NumLib::ConvergenceCriterionPerComponentDeltaX::reset().

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

• NumLib/ODESolver/ConvergenceCriterion.h