MueLu_Amesos2Smoother_decl.hpp

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// @HEADER
// *****************************************************************************
//        MueLu: A package for multigrid based preconditioning
//
// Copyright 2012 NTESS and the MueLu contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER
 
#ifndef MUELU_AMESOS2SMOOTHER_DECL_HPP
#define MUELU_AMESOS2SMOOTHER_DECL_HPP
 
#include "MueLu_ConfigDefs.hpp"
 
#include <Teuchos_ParameterList.hpp>
#include <Teuchos_SerialDenseMatrix.hpp>
#include <Teuchos_LAPACK.hpp>
 
#include "MueLu_Amesos2Smoother_fwd.hpp"
 
#include "MueLu_SmootherPrototype.hpp"
#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_Utilities_fwd.hpp"
 
namespace Amesos2 {
template <class OP, class MV>
class Solver;
}
 
namespace MueLu {
 
template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
class Projection {
 public:
  Projection(RCP<Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>>& Nullspace);
 
  void projectOut(Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& X);
 
  Teuchos::RCP<Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>> Nullspace_;
 
 private:
  Teuchos::RCP<const Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node>> localMap_;
};
 
template <class Scalar        = SmootherPrototype<>::scalar_type,
          class LocalOrdinal  = typename SmootherPrototype<Scalar>::local_ordinal_type,
          class GlobalOrdinal = typename SmootherPrototype<Scalar, LocalOrdinal>::global_ordinal_type,
          class Node          = typename SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal>::node_type>
class Amesos2Smoother : public SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal, Node> {
#undef MUELU_AMESOS2SMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"
 
 public:
 
 
  Amesos2Smoother(const std::string& type = "", const Teuchos::ParameterList& paramList = Teuchos::ParameterList());
 
  virtual ~Amesos2Smoother();
 
  RCP<const ParameterList> GetValidParameterList() const;
 
 
 
 
  void DeclareInput(Level& currentLevel) const;
 
 
 
 
  void Setup(Level& currentLevel);
 
  void Apply(MultiVector& X, const MultiVector& B, bool InitialGuessIsZero = false) const;
 
  RCP<SmootherPrototype> Copy() const;
 
 
 
  std::string description() const;
 
  // using MueLu::Describable::describe; // overloading, not hiding
  void print(Teuchos::FancyOStream& out, const VerbLevel verbLevel = Default) const;
 
  size_t getNodeSmootherComplexity() const;
 
 
 private:
  typedef Tpetra::CrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> Tpetra_CrsMatrix;
  typedef Tpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node> Tpetra_MultiVector;
 
  std::string type_;
 
  RCP<Amesos2::Solver<Tpetra_CrsMatrix, Tpetra_MultiVector>> prec_;
 
  bool useTransformation_;
  RCP<MultiVector> X_, B_;
 
  RCP<Projection<Scalar, LocalOrdinal, GlobalOrdinal, Node>> projection_;
 
};  // class Amesos2Smoother
 
}  // namespace MueLu
 
#define MUELU_AMESOS2SMOOTHER_SHORT
#endif  // MUELU_AMESOS2SMOOTHER_DECL_HPP