Sequential conjugate gradient solver preconditioned with AMG smoothed by SSOR.
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#include <dune/pdelab/backend/istl/seqistlsolverbackend.hh>
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| ISTLBackend_SEQ_CG_AMG_SSOR (unsigned maxiter_=5000, int verbose_=1, bool reuse_=false, bool usesuperlu_=true) |
| Constructor.
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void | setparams (Parameters params_) |
| set AMG parameters
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void | setReuse (bool reuse_) |
| Set whether the AMG should be reused again during call to apply().
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bool | getReuse () const |
| Return whether the AMG is reused during call to apply()
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V::ElementType | norm (const V &v) const |
| compute global norm of a vector
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void | apply (M &A, V &z, V &r, typename Dune::template FieldTraits< typename V::ElementType >::real_type reduction) |
| solve the given linear system
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const ISTLAMGStatistics & | statistics () const |
| Get statistics of the AMG solver (no of levels, timings).
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const Dune::PDELab::LinearSolverResult< double > & | result () const |
| Return access to result data.
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template<class GO>
class Dune::PDELab::ISTLBackend_SEQ_CG_AMG_SSOR< GO >
Sequential conjugate gradient solver preconditioned with AMG smoothed by SSOR.
- Template Parameters
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GO | The type of the grid operator (or the fakeGOTraits class for the old grid operator space). |
- Examples
- recipe-geometry-grid.cc, and recipe-linear-system-solution-pdelab.cc.
◆ ISTLBackend_SEQ_CG_AMG_SSOR()
Constructor.
- Parameters
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maxiter_ | The maximum number of iterations allowed. |
verbose_ | The verbosity level to use. |
reuse_ | Set true, if the Matrix to be used is always identical (AMG aggregation is then only performed once). |
usesuperlu_ | Set false, to suppress the no SuperLU warning |
◆ apply()
void Dune::PDELab::ISTLBackend_SEQ_AMG< GO, Dune::SeqSSOR , Dune::CGSolver , false >::apply |
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M & |
A, |
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V & |
z, |
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V & |
r, |
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typename Dune::template FieldTraits< typename V::ElementType >::real_type |
reduction |
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) |
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inlineinherited |
solve the given linear system
- Parameters
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[in] | A | the given matrix |
[out] | z | the solution vector to be computed |
[in] | r | right hand side |
[in] | reduction | to be achieved |
◆ getReuse()
Return whether the AMG is reused during call to apply()
◆ norm()
compute global norm of a vector
- Parameters
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◆ result()
Return access to result data.
◆ setparams()
set AMG parameters
- Parameters
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[in] | params_ | a parameter object of Type Dune::Amg::Parameters |
◆ setReuse()
Set whether the AMG should be reused again during call to apply().
◆ statistics()
Get statistics of the AMG solver (no of levels, timings).
- Returns
- statistis of the AMG solver.
◆ res
The documentation for this class was generated from the following file: