discrete_divergence.hpp

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// Copyright (c) 2010-2024, Lawrence Livermore National Security, LLC. Produced
// at the Lawrence Livermore National Laboratory. All Rights reserved. See files
// LICENSE and NOTICE for details. LLNL-CODE-806117.
//
// This file is part of the MFEM library. For more information and source code
// availability visit https://mfem.org.
//
// MFEM is free software; you can redistribute it and/or modify it under the
// terms of the BSD-3 license. We welcome feedback and contributions, see file
// CONTRIBUTING.md for details.
 
#ifndef MFEM_DISCRETE_DIVERGENCE_HPP
#define MFEM_DISCRETE_DIVERGENCE_HPP
 
#include "mfem.hpp"
 
namespace mfem
{
 
/// @brief Eliminates columns in the given HypreParMatrix.
///
/// This is similar to HypreParMatrix::EliminateBC, except that only the columns
/// are eliminated.
void EliminateColumns(HypreParMatrix &D, const Array<int> &ess_dofs);
 
HypreParMatrix *FormDiscreteDivergenceMatrix(ParFiniteElementSpace &fes_rt,
                                             ParFiniteElementSpace &fes_l2,
                                             const Array<int> &ess_dofs);
 
} // namespace mfem
 
#endif