text: /**
   * \file
   * \copyright
   * Copyright (c) 2012-2021, OpenGeoSys Community (http://www.opengeosys.org)
   *            Distributed under a Modified BSD License.
   *              See accompanying file LICENSE.txt or
   *              http://www.opengeosys.org/project/license
   *
   */
  
  #pragma once
  
  namespace NumLib
  {
  //! \addtogroup ODESolver
  //! @{
  
  //! Tag used to specify which nonlinear solver will be used.
  enum class NonlinearSolverTag : bool
  {
      Picard /*!< Picard fixpoint iteration scheme */,
      Newton /*!< Newton-Raphson iteration scheme */
  };
  
  //! Tag used to specify the type of ODE.
  enum class ODESystemTag : char
  {
      /*! First order implicit quasi-linear ODE
       *
       * This is an ODE of the form
       * \f$ M(x,t)\cdot \dot x + K(x,t) \cdot x - b(x,t)
       *  =: r(\dot x, x, t) \stackrel{!}{=} 0 \f$
       */
      FirstOrderImplicitQuasilinear,
      NeumannBC  // Sure, that's misuse of this enum, so sue me!
  };
  
  //! @}
  
  }  // namespace NumLib
  