Stokhos_KLReducedMatrixFreeOperator.hpp

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// @HEADER
// *****************************************************************************
//                           Stokhos Package
//
// Copyright 2009 NTESS and the Stokhos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef STOKHOS_KL_REDUCED_MATRIX_FREE_OPERATOR_HPP
#define STOKHOS_KL_REDUCED_MATRIX_FREE_OPERATOR_HPP

#include "Stokhos_SGOperator.hpp"
#include "EpetraExt_MultiComm.h"
#include "Stokhos_OrthogPolyBasis.hpp"
#include "Stokhos_EpetraSparse3Tensor.hpp"
#include "Epetra_Map.h"
#include "Teuchos_ParameterList.hpp"
#include "Teuchos_Array.hpp"

#include "Epetra_MultiVector.h"
#include "Stokhos_VectorOrthogPoly.hpp"
#include "Stokhos_VectorOrthogPolyTraitsEpetra.hpp"
#include "Stokhos_EpetraVectorOrthogPoly.hpp"
#include "Stokhos_MatrixFreeOperator.hpp"

namespace Stokhos {
    
  class KLReducedMatrixFreeOperator : public Stokhos::SGOperator {
      
  public:

    KLReducedMatrixFreeOperator(
      const Teuchos::RCP<const EpetraExt::MultiComm>& sg_comm,
      const Teuchos::RCP<const Stokhos::OrthogPolyBasis<int,double> >& sg_basis,
      const Teuchos::RCP<const Stokhos::EpetraSparse3Tensor>& epetraCijk,
      const Teuchos::RCP<const Epetra_Map>& domain_base_map,
      const Teuchos::RCP<const Epetra_Map>& range_base_map,
      const Teuchos::RCP<const Epetra_Map>& domain_sg_map,
      const Teuchos::RCP<const Epetra_Map>& range_sg_map,
      const Teuchos::RCP<Teuchos::ParameterList>& params);
    
    virtual ~KLReducedMatrixFreeOperator();


    virtual void setupOperator(
      const Teuchos::RCP<Stokhos::EpetraOperatorOrthogPoly >& poly);

    virtual Teuchos::RCP< Stokhos::EpetraOperatorOrthogPoly > 
    getSGPolynomial();

    virtual Teuchos::RCP<const Stokhos::EpetraOperatorOrthogPoly > 
    getSGPolynomial() const;


    
    virtual int SetUseTranspose(bool UseTranspose);
    
    virtual int Apply(const Epetra_MultiVector& Input, 
                      Epetra_MultiVector& Result) const;

    virtual int ApplyInverse(const Epetra_MultiVector& X, 
                             Epetra_MultiVector& Y) const;
    
    virtual double NormInf() const;
    
    virtual const char* Label () const;
  
    virtual bool UseTranspose() const;
    
    virtual bool HasNormInf() const;

    virtual const Epetra_Comm & Comm() const;

    virtual const Epetra_Map& OperatorDomainMap () const;

    virtual const Epetra_Map& OperatorRangeMap () const;


  protected:

    void setup();

  private:
    
    KLReducedMatrixFreeOperator(const KLReducedMatrixFreeOperator&);
    
    KLReducedMatrixFreeOperator& operator=(const KLReducedMatrixFreeOperator&);
    
  protected:
    
    std::string label;

    Teuchos::RCP<const EpetraExt::MultiComm> sg_comm;

    Teuchos::RCP<const Stokhos::OrthogPolyBasis<int,double> > sg_basis;

    Teuchos::RCP<const Stokhos::EpetraSparse3Tensor> epetraCijk;
    
    Teuchos::RCP<const Epetra_Map> domain_base_map;

    Teuchos::RCP<const Epetra_Map> range_base_map;

    Teuchos::RCP<const Epetra_Map> domain_sg_map;

    Teuchos::RCP<const Epetra_Map> range_sg_map;

    typedef Stokhos::Sparse3Tensor<int,double> Cijk_type;

    Teuchos::RCP<const Cijk_type> Cijk;

    Teuchos::RCP<Stokhos::EpetraOperatorOrthogPoly > block_ops;

    Teuchos::RCP<Teuchos::ParameterList> params;

    bool useTranspose;

    int expansion_size;

    int num_blocks;

    int num_KL;

    int num_KL_computed;

    Teuchos::RCP<Epetra_CrsMatrix> mean;

    Teuchos::RCP<Epetra_Map> block_vec_map;

    Teuchos::RCP< Stokhos::EpetraVectorOrthogPoly> block_vec_poly;

    Teuchos::Array< Teuchos::Array<double> > dot_products;

    Teuchos::RCP< Stokhos::Sparse3Tensor<int,double> > sparse_kl_coeffs;

    Teuchos::Array< Teuchos::RCP<Epetra_CrsMatrix> > kl_blocks;

    Teuchos::RCP< Stokhos::EpetraOperatorOrthogPoly > kl_ops;

    Teuchos::RCP< Stokhos::MatrixFreeOperator > kl_mat_free_op;

    double drop_tolerance;

    bool do_error_tests;

  }; // class KLReducedMatrixFreeOperator
  
} // namespace Stokhos

#endif // STOKHOS_KL_REDUCED_MATRIX_FREE_OPERATOR_HPP