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MueLu_ShiftedLaplacianOperator_def.hpp
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46 
47 #ifndef MUELU_SHIFTEDLAPLACIANOPERATOR_DEF_HPP
48 #define MUELU_SHIFTEDLAPLACIANOPERATOR_DEF_HPP
49 
50 #include "MueLu_ConfigDefs.hpp"
51 
52 #ifdef HAVE_MUELU_TPETRA
53 
54 #include <Xpetra_Matrix.hpp>
55 #include <Xpetra_CrsMatrixWrap.hpp>
57 #include <Xpetra_TpetraMultiVector.hpp>
59 
61 #include "MueLu_Hierarchy.hpp"
62 #include "MueLu_Utilities.hpp"
63 
64 
65 namespace MueLu {
66 
67 // ------------- getDomainMap -----------------------
68 
69 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
72 getDomainMap () const
73 {
75 
76  RCP<MueLu::Level> L0 = Hierarchy_->GetLevel (0);
77  RCP<XMatrix> A = L0->Get<RCP<XMatrix> > ("A");
78 
81  if (tpbA != Teuchos::null) {
82  return Xpetra::toTpetraNonZero (tpbA->getDomainMap ());
83  }
84 
87  return tpA->getDomainMap ();
88 }
89 
90 // ------------- getRangeMap -----------------------
91 
92 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
95 getRangeMap () const
96 {
98 
99  RCP<MueLu::Level> L0 = Hierarchy_->GetLevel(0);
100  RCP<XMatrix> A = L0->Get< RCP<XMatrix> >("A");
101 
104  if(tpbA != Teuchos::null)
105  return Xpetra::toTpetraNonZero(tpbA->getRangeMap());
106 
109  return tpA->getRangeMap();
110 }
111 
112 // ------------- apply -----------------------
113 
114 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
115 void ShiftedLaplacianOperator<Scalar,LocalOrdinal,GlobalOrdinal,Node>::apply(const Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& X,
116  Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& Y,
117  Teuchos::ETransp /* mode */, Scalar /* alpha */, Scalar /* beta */) const {
118 
119  typedef Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> TMV;
121  // typedef Xpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> XMV; // unused
122 
123  TMV & temp_x = const_cast<TMV &>(X);
124  const XTMV tX(rcpFromRef(temp_x));
125  XTMV tY(rcpFromRef(Y));
126 
127  try {
128  tY.putScalar(0.0);
129  Hierarchy_->Iterate(tX, tY, cycles_, true);
130  }
131 
132  catch(std::exception& e) {
133  //FIXME add message and rethrow
134  std::cerr << "Caught an exception in MueLu::ShiftedLaplacianOperator::ApplyInverse():" << std::endl
135  << e.what() << std::endl;
136  }
137 
138  // update solution with 2-grid error correction
139  /*if(option_==1) {
140  for(int j=0; j<cycles_; j++) {
141  RCP<XMV> residual = MueLu::Utilities<Scalar,LocalOrdinal,GlobalOrdinal,Node>::Residual(*A_, tY, tX);
142  RCP<XMV> coarseResidual = Xpetra::MultiVectorFactory<Scalar,LocalOrdinal,GlobalOrdinal,Node>::Build(R_->getRangeMap(), tX.getNumVectors());
143  RCP<XMV> coarseError = Xpetra::MultiVectorFactory<Scalar,LocalOrdinal,GlobalOrdinal,Node>::Build(R_->getRangeMap(), tX.getNumVectors());
144  R_ -> apply(*residual, *coarseResidual, Teuchos::NO_TRANS, (Scalar) 1.0, (Scalar) 0.0);
145  RCP<TMV> tcoarseR = MueLu::Utilities<Scalar,LocalOrdinal,GlobalOrdinal,Node>::MV2NonConstTpetraMV(coarseResidual);
146  RCP<TMV> tcoarseE = MueLu::Utilities<Scalar,LocalOrdinal,GlobalOrdinal,Node>::MV2NonConstTpetraMV(coarseError);
147  BelosLP_ -> setProblem(tcoarseE,tcoarseR);
148  BelosSM_ -> solve();
149  RCP<XMV> fineError = Xpetra::MultiVectorFactory<Scalar,LocalOrdinal,GlobalOrdinal,Node>::Build(P_->getRangeMap(), tX.getNumVectors());
150  XTMV tmpcoarseE(rcpFromRef(*tcoarseE));
151  P_ -> apply(tmpcoarseE, *fineError, Teuchos::NO_TRANS, (Scalar) 1.0, (Scalar) 0.0);
152  tY.update((Scalar) 1.0, *fineError, (Scalar) 1.0);
153  }
154  }
155 
156  try {
157  Hierarchy_->Iterate(tX, tY, 1, false);
158  }
159 
160  catch(std::exception& e) {
161  //FIXME add message and rethrow
162  std::cerr << "Caught an exception in MueLu::ShiftedLaplacianOperator::ApplyInverse():" << std::endl
163  << e.what() << std::endl;
164  }*/
165 
166 }
167 
168 // ------------- apply -----------------------
169 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
171  return false;
172 }
173 
174 } // namespace
175 #endif //ifdef HAVE_MUELU_TPETRA
176 
177 #endif //ifdef MUELU_SHIFTEDLAPLACIANOPERATOR_DEF_HPP
T & Get(const std::string &ename, const FactoryBase *factory=NoFactory::get())
Get data without decrementing associated storage counter (i.e., read-only access). Usage: Level-&gt;Get&lt; RCP&lt;Matrix&gt; &gt;(&quot;A&quot;, factory) if factory == NULL =&gt; use default factory.
const RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > toTpetraNonZero(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &map)
Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getDomainMap() const
Returns the Tpetra::Map object associated with the domain of this operator.
void apply(const Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &X, Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &Y, Teuchos::ETransp mode=Teuchos::NO_TRANS, Scalar alpha=Teuchos::ScalarTraits< Scalar >::one(), Scalar beta=Teuchos::ScalarTraits< Scalar >::one()) const
Returns in Y the result of a Tpetra::Operator applied to a Tpetra::MultiVector X. ...
bool hasTransposeApply() const
Indicates whether this operator supports applying the adjoint operator.
static RCP< Tpetra::CrsMatrix< Scalar, LocalOrdinal, GlobalOrdinal, Node > > Op2NonConstTpetraCrs(RCP< Xpetra::Matrix< Scalar, LocalOrdinal, GlobalOrdinal, Node > > Op)
Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getRangeMap() const
Returns the Tpetra::Map object associated with the range of this operator.