/* ***********************************************************************
//
//   Copyright (C) 2025 -- The 4D-STAR Collaboration
//   File Author: Emily Boudreaux
//   Last Modified: February 12, 2025
//
//   4DSSE is free software; you can use it and/or modify
//   it under the terms and restrictions the GNU General Library Public
//   License version 3 (GPLv3) as published by the Free Software Foundation.
//
//   4DSSE 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 Library General Public License for more details.
//
//   You should have received a copy of the GNU Library General Public License
//   along with this software; if not, write to the Free Software
//   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// *********************************************************************** */

#ifndef POLYCOEFF_H
#define POLYCOEFF_H

#include "mfem.hpp"
#include <cmath>

namespace polycoeff
{
  /**
   * @brief Computes the xi coefficient function.
   * 
   * @param x Input vector.
   * @return double The computed xi coefficient.
   */
    double nonlinearSourceCoeff(const mfem::Vector &x);

  /**
   * @brief Computes the vector xi coefficient function.
   * 
   * @param x Input vector.
   * @param v Output vector to store the computed xi coefficient.
   */
    void diffusionCoeff(const mfem::Vector &x, mfem::Vector &v);
} // namespace polyCoeff

#endif // POLYCOEFF_H