NewtonIterationUtilities.hpp

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/*
  Copyright 2015 SINTEF ICT, Applied Mathematics.

  This file is part of the Open Porous Media project (OPM).

  OPM is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  OPM is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef OPM_NEWTONITERATIONUTILITIES_HEADER_INCLUDED
#define OPM_NEWTONITERATIONUTILITIES_HEADER_INCLUDED

#include <opm/autodiff/AutoDiffBlock.hpp>
#include <vector>

namespace Opm
{

    std::vector< AutoDiffBlock<double> >
    eliminateVariable(const std::vector< AutoDiffBlock<double> >& eqs,
                      const int n);

    AutoDiffBlock<double>::V recoverVariable(const AutoDiffBlock<double>& equation,
                                             const AutoDiffBlock<double>::V& partial_solution,
                                             const int n);

    void formEllipticSystem(const int num_phases,
                            const std::vector< AutoDiffBlock<double> >& eqs,
                            Eigen::SparseMatrix<double, Eigen::RowMajor>& A,
                            AutoDiffBlock<double>::V& b);


} // namespace Opm

#endif // OPM_NEWTONITERATIONUTILITIES_HEADER_INCLUDED