alpha.hh

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#ifndef alpha_hh
#define alpha_hh
 
#include "basics/typedefs.hh"
#include "function/vector.hh"
#include "timestepping/strategy.hh"
 
namespace concepts {
  template<typename F>
  class Operator;
}
 
namespace timestepping {
 
  using concepts::Real;
 
  class TimeVector;
 
  // ***************************************************************** Alpha **
 
  class Alpha : public TimeStepStrategy {
  public:
    Alpha(concepts::SolverFabric<Real>& fabric,
          concepts::Operator<Real>& D2,
          concepts::Operator<Real>& D0,
          timestepping::TimeVector& trhs,
          const concepts::Vector<Real>& Y0,
          const concepts::Vector<Real>& Z0, 
          Real dt, Real alpha = 0.);
  protected:
    virtual std::ostream& info(std::ostream& os) const;
    virtual void next();
  private:
    concepts::Operator<Real>& D0_;
    timestepping::TimeVector &trhs_;
    concepts::Vector<Real> Z_, A_;
    Real alpha_, beta_, gamma_;
  };
}
 
#endif // alpha_hh