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BelosCGIteration.hpp
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41 
42 #ifndef BELOS_CG_ITERATION_HPP
43 #define BELOS_CG_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>
64 
67 
70 
73 
76 
77  CGIterationState() : R(Teuchos::null), Z(Teuchos::null),
78  P(Teuchos::null), AP(Teuchos::null)
79  {}
80  };
81 
83 
84 
96  class CGIterationInitFailure : public BelosError {public:
97  CGIterationInitFailure(const std::string& what_arg) : BelosError(what_arg)
98  {}};
99 
106  class CGIterateFailure : public BelosError {public:
107  CGIterateFailure(const std::string& what_arg) : BelosError(what_arg)
108  {}};
109 
116  CGPositiveDefiniteFailure(const std::string& what_arg) : CGIterateFailure(what_arg)
117  {}};
118 
125  class CGIterationOrthoFailure : public BelosError {public:
126  CGIterationOrthoFailure(const std::string& what_arg) : BelosError(what_arg)
127  {}};
128 
135  class CGIterationLAPACKFailure : public BelosError {public:
136  CGIterationLAPACKFailure(const std::string& what_arg) : BelosError(what_arg)
137  {}};
138 
140 
141 
142 template<class ScalarType, class MV, class OP>
143 class CGIteration : virtual public Iteration<ScalarType,MV,OP> {
144 
145  public:
146 
148 
149 
163  virtual void initializeCG(CGIterationState<ScalarType,MV>& newstate) = 0;
164 
171  virtual CGIterationState<ScalarType,MV> getState() const = 0;
173 
174 
176  virtual void setDoCondEst(bool val) = 0;
177 
180 
183 
184 };
185 
186 } // end Belos namespace
187 
188 #endif /* BELOS_CG_ITERATION_HPP */
Teuchos::RCP< const MV > R
The current residual.
Collection of types and exceptions used within the Belos solvers.
CGIterateFailure(const std::string &what_arg)
CGIterationOrthoFailure(const std::string &what_arg)
virtual void initializeCG(CGIterationState< ScalarType, MV > &newstate)=0
Initialize the solver to an iterate, providing a complete state.
Structure to contain pointers to CGIteration state variables.
virtual void setDoCondEst(bool val)=0
Sets whether or not to store the diagonal for condition estimation.
Pure virtual base class which describes the basic interface to the linear solver iteration.
CGIterateFailure is thrown when the CGIteration object is unable to compute the next iterate in the C...
virtual Teuchos::ArrayView< typename Teuchos::ScalarTraits< ScalarType >::magnitudeType > getDiag()=0
Gets the diagonal for condition estimation.
Teuchos::RCP< const MV > AP
The matrix A applied to current decent direction vector.
CGPositiveDefiniteFailure is thrown when the the CG &#39;alpha = p^H*A*P&#39; value is less than zero...
CGIterationLAPACKFailure is thrown when a nonzero return value is passed back from an LAPACK routine...
virtual Teuchos::ArrayView< typename Teuchos::ScalarTraits< ScalarType >::magnitudeType > getOffDiag()=0
Gets the off-diagonal for condition estimation.
Teuchos::RCP< const MV > Z
The current preconditioned residual.
CGIterationOrthoFailure is thrown when the CGIteration object is unable to compute independent direct...
CGIterationLAPACKFailure(const std::string &what_arg)
CGPositiveDefiniteFailure(const std::string &what_arg)
CGIterationInitFailure is thrown when the CGIteration object is unable to generate an initial iterate...
Parent class to all Belos exceptions.
Definition: BelosTypes.hpp:60
virtual CGIterationState< ScalarType, MV > getState() const =0
Get the current state of the linear solver.
Belos header file which uses auto-configuration information to include necessary C++ headers...
CGIterationInitFailure(const std::string &what_arg)
Teuchos::RCP< const MV > P
The current decent direction vector.

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