Dune::CompleteFCGSolver< X > Class Template Reference

Complete flexible conjugate gradient method. More...

#include <dune/istl/solvers.hh>

Public Types
typedef X	domain_type
	Type of the domain of the operator to be inverted.
typedef X	range_type
	Type of the range of the operator to be inverted.
typedef X::field_type	field_type
	The field type of the operator.
typedef FieldTraits< field_type >::real_type	real_type
	The real type of the field type (is the same if using real numbers, but differs for std::complex)
typedef Simd::Scalar< real_type >	scalar_real_type
	scalar type underlying the field_type

Public Member Functions
void	apply (X &x, X &b, InverseOperatorResult &res) override
	Apply inverse operator. More...
void	apply (X &x, X &b, double reduction, InverseOperatorResult &res) override
	Apply inverse operator with given reduction factor. More...
SolverCategory::Category	category () const override
	Category of the solver (see SolverCategory::Category)

Protected Member Functions
void	printHeader (std::ostream &s) const
	helper function for printing header of solver output
void	printOutput (std::ostream &s, const CountType &iter, const DataType &norm, const DataType &norm_old) const
	helper function for printing solver output
void	printOutput (std::ostream &s, const CountType &iter, const DataType &norm) const
	helper function for printing solver output

Detailed Description

template<class X>
class Dune::CompleteFCGSolver< X >

Complete flexible conjugate gradient method.

This solver is a simple modification of the RestartedFCGSolver and, if possible, uses mmax old directions. It uses noticeably more memory, but provides more stability for preconditioner changes.

Member Function Documentation

apply() [1/2]

void Dune::IterativeSolver< X, X >::apply ( X &  x, X &  b, double  reduction, InverseOperatorResult &  res  )

inlineoverridevirtualinherited

Apply inverse operator with given reduction factor.

apply inverse operator, with given convergence criteria.

Warning

Right hand side b may be overwritten!

Parameters

x	The left hand side to store the result in.
b	The right hand side
reduction	The minimum defect reduction to achieve.
res	Object to store the statistics about applying the operator.

Exceptions

SolverAbort

When the solver detects a problem and cannot continue

Implements Dune::InverseOperator< X, X >.

Reimplemented in Dune::RestartedGMResSolver< X, X >.

apply() [2/2]

template<class X >

void Dune::CompleteFCGSolver< X >::apply ( X &  x, X &  b, InverseOperatorResult &  res  )

inlineoverridevirtual

Apply inverse operator.

Apply inverse operator,.

Warning

Note: right hand side b may be overwritten!

Parameters

x	The left hand side to store the result in.
b	The right hand side
res	Object to store the statistics about applying the operator.

Exceptions

SolverAbort

When the solver detects a problem and cannot continue

Note

Currently, the RestartedFCGSolver aborts when a NaN or infinite defect is detected. However, -ffinite-math-only (implied by -ffast-math) can inhibit a result from becoming NaN that really should be NaN. E.g. numeric_limits<double>::quiet_NaN()*0.0==0.0 with gcc-5.3 -ffast-math.

Reimplemented from Dune::RestartedFCGSolver< X >.

References Dune::RestartedFCGSolver< X >::apply().

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

• dune/istl/solvers.hh