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BelosGmresIteration.hpp
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41 
42 #ifndef BELOS_GMRES_ITERATION_HPP
43 #define BELOS_GMRES_ITERATION_HPP
44 
49 #include "BelosConfigDefs.hpp"
50 #include "BelosTypes.hpp"
51 #include "BelosIteration.hpp"
52 
53 namespace Belos {
54 
56 
57 
62  template <class ScalarType, class MV>
68  int curDim;
69 
72 
75 
89 
90 
91  GmresIterationState() : curDim(0), V(Teuchos::null), Z(Teuchos::null),
92  H(Teuchos::null), R(Teuchos::null),
93  z(Teuchos::null)
94  {}
95  };
96 
98 
100 
101 
113  class GmresIterationInitFailure : public BelosError {public:
114  GmresIterationInitFailure(const std::string& what_arg) : BelosError(what_arg)
115  {}};
116 
123  class GmresIterationOrthoFailure : public BelosError {public:
124  GmresIterationOrthoFailure(const std::string& what_arg) : BelosError(what_arg)
125  {}};
126 
133  class GmresIterationLAPACKFailure : public BelosError {public:
134  GmresIterationLAPACKFailure(const std::string& what_arg) : BelosError(what_arg)
135  {}};
136 
138 
139 
140 template<class ScalarType, class MV, class OP>
141 class GmresIteration : virtual public Iteration<ScalarType,MV,OP> {
142 
143  public:
144 
146 
147 
161  virtual void initializeGmres(GmresIterationState<ScalarType,MV>& newstate) = 0;
162 
169  virtual GmresIterationState<ScalarType,MV> getState() const = 0;
171 
173 
174 
176 
179  virtual void updateLSQR( int dim = -1 ) = 0;
180 
182  virtual int getCurSubspaceDim() const = 0;
183 
185  virtual int getMaxSubspaceDim() const = 0;
186 
188 
190 
191 
198  virtual void setSize(int blockSize, int numBlocks) = 0;
199 
201 
202 };
203 
204 } // end Belos namespace
205 
206 #endif /* BELOS_GMRES_ITERATION_HPP */
Collection of types and exceptions used within the Belos solvers.
virtual void updateLSQR(int dim=-1)=0
Method for updating QR factorization of upper Hessenberg matrix.
Teuchos::RCP< const MV > V
The current Krylov basis.
Teuchos::RCP< const Teuchos::SerialDenseMatrix< int, ScalarType > > z
The current right-hand side of the least squares system RY = Z.
GmresIterationLAPACKFailure is thrown when a nonzero return value is passed back from an LAPACK routi...
virtual int getCurSubspaceDim() const =0
Get the dimension of the search subspace used to generate the current solution to the linear problem...
Structure to contain pointers to GmresIteration state variables.
Pure virtual base class which describes the basic interface to the linear solver iteration.
GmresIterationInitFailure is thrown when the GmresIteration object is unable to generate an initial i...
Teuchos::RCP< const MV > Z
The current preconditioned Krylov basis (only used in flexible GMRES).
virtual int getMaxSubspaceDim() const =0
Get the maximum dimension allocated for the search subspace.
int curDim
The current dimension of the reduction.
Teuchos::RCP< const Teuchos::SerialDenseMatrix< int, ScalarType > > R
The current upper-triangular matrix from the QR reduction of H.
virtual GmresIterationState< ScalarType, MV > getState() const =0
Get the current state of the linear solver.
virtual void initializeGmres(GmresIterationState< ScalarType, MV > &newstate)=0
Initialize the solver to an iterate, providing a complete state.
GmresIterationLAPACKFailure(const std::string &what_arg)
GmresIterationInitFailure(const std::string &what_arg)
Parent class to all Belos exceptions.
Definition: BelosTypes.hpp:60
GmresIterationOrthoFailure(const std::string &what_arg)
GmresIterationOrthoFailure is thrown when the GmresIteration object is unable to compute independent ...
Belos header file which uses auto-configuration information to include necessary C++ headers...
virtual void setSize(int blockSize, int numBlocks)=0
Set the blocksize and number of blocks to be used by the iterative solver in solving this linear prob...
Teuchos::RCP< const Teuchos::SerialDenseMatrix< int, ScalarType > > H
The current Hessenberg matrix.

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