#include <solvers.hh>
Symmetrically Preconditioned MINRES as in A. Greenbaum, 'Iterative Methods for Solving Linear Systems', pp. 121 Iterative solver for symmetric indefinite operators. Note that in order to ensure the (symmetrically) preconditioned system to remain symmetric, the preconditioner has to be spd.
Public Types | |
typedef X | domain_type |
The domain type of the operator to be inverted. | |
typedef X | range_type |
The range type of the operator to be inverted. | |
typedef X::field_type | field_type |
The field type of the operator to be inverted. | |
Public Member Functions | |
template<class L, class P> | |
MINRESSolver (L &op, P &prec, double reduction, int maxit, int verbose) | |
Set up MINRES solver. | |
template<class L, class S, class P> | |
MINRESSolver (L &op, S &sp, P &prec, double reduction, int maxit, int verbose) | |
Set up MINRES solver. | |
virtual void | apply (X &x, X &b, InverseOperatorResult &res) |
Apply inverse operator. | |
virtual void | apply (X &x, X &b, double reduction, InverseOperatorResult &res) |
Apply inverse operator with given reduction factor. | |
Protected Member Functions | |
void | printHeader (std::ostream &s) const |
helper function for printing header of solver output | |
void | printOutput (std::ostream &s, const double iter, const DataType &norm, const DataType &norm_old) const |
helper function for printing solver output | |
void | printOutput (std::ostream &s, const double iter, const DataType &norm) const |
helper function for printing solver output |
Dune::MINRESSolver< X >::MINRESSolver | ( | L & | op, | |
P & | prec, | |||
double | reduction, | |||
int | maxit, | |||
int | verbose | |||
) | [inline] |
Set up MINRES solver.
Set up Loop solver.
op | The operator we solve. | |
prec | The preconditioner to apply in each iteration of the loop. Has to inherit from Preconditioner. | |
reduction | The relative defect reduction to achieve when applying the operator. | |
maxit | The maximum number of iteration steps allowed when applying the operator. | |
verbose | The verbosity level. |
References Dune::SolverCategory::sequential.
Dune::MINRESSolver< X >::MINRESSolver | ( | L & | op, | |
S & | sp, | |||
P & | prec, | |||
double | reduction, | |||
int | maxit, | |||
int | verbose | |||
) | [inline] |
Set up MINRES solver.
Set up loop solver.
op | The operator we solve. | |
sp | The scalar product to use, e. g. SeqScalarproduct. | |
prec | The preconditioner to apply in each iteration of the loop. Has to inherit from Preconditioner. | |
reduction | The relative defect reduction to achieve when applying the operator. | |
maxit | The maximum number of iteration steps allowed when applying the operator. | |
verbose | The verbosity level. |
virtual void Dune::MINRESSolver< X >::apply | ( | X & | x, | |
X & | b, | |||
InverseOperatorResult & | res | |||
) | [inline, virtual] |
Apply inverse operator.
Apply inverse operator,.
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. |
Implements Dune::InverseOperator< X, X >.
References Dune::LinearOperator< X, Y >::apply(), Dune::Preconditioner< X, Y >::apply(), Dune::LinearOperator< X, Y >::applyscaleadd(), Dune::InverseOperatorResult::clear(), Dune::InverseOperatorResult::conv_rate, Dune::InverseOperatorResult::converged, Dune::InverseOperatorResult::elapsed, Dune::InverseOperatorResult::iterations, Dune::Preconditioner< X, Y >::post(), Dune::Preconditioner< X, Y >::pre(), Dune::InverseOperator< X, X >::printHeader(), Dune::InverseOperator< X, X >::printOutput(), and Dune::InverseOperatorResult::reduction.
virtual void Dune::MINRESSolver< X >::apply | ( | X & | x, | |
X & | b, | |||
double | reduction, | |||
InverseOperatorResult & | res | |||
) | [inline, virtual] |
Apply inverse operator with given reduction factor.
apply inverse operator, with given convergence criteria.
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. |
Implements Dune::InverseOperator< X, X >.