Matrice_Sym.h

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#ifndef Matrice_Sym_included
#define Matrice_Sym_included
 
#define _DEGRE_POLY_ 5
#define _SEUIL_GCP_ 1e-12
 
#include <TRUSTTabs_forward.h>
#include <Matrice_Base.h>
 
/*! @brief Classe Matrice_Sym Cette classe est la classe de base pour la representantion des
 *
 *     matrices symetriques. Cette classe est en fait une classe "interface"
 *     qui donne acces a des methodes de resolutions de systemes lineaires
 *     dont la matrice est symetrique: Gradient conjugue (preconditionne),
 *     solveur SSOR, precondtionneur polynomial.
 *     Cette classe ne contient pas de membre de donnee (hors mis ceux herites de
 *     Process) car elle sera utilisee par heritage multiple.
 *     Elle "accede" a la matrice via la methode de multiplication matrice-vecteur
 *     DoubleVect& multvect(const DoubleVect&, DoubleVect& resu) const
 *     qui est une methode abstraite.
 *
 * @sa Matrice_Morse_Sym, Cette classe n'herite pas d'objet U car elle est utilisee par, heritage multiple avec d'autre classe heritant deja d'objet U., Classe abstraite
 */
 
class Matrice_Sym
{
public :
  virtual ~Matrice_Sym() {};
  Matrice_Sym():est_definie_(0) {}
 
  int get_est_definie() const;
  void set_est_definie(int);
  void unsymmetrize_stencil(const int nb_lines, const Stencil& symmetric_stencil, Stencil& stencil) const;
  void unsymmetrize_stencil_and_coefficients(const int nb_lines, const Stencil& symmetric_stencil, const StencilCoeffs& symmetric_coefficients, Stencil& stencil, StencilCoeffs& coefficients) const;
 
protected :
  virtual DoubleTab& ajouter_multTab_(const DoubleTab&, DoubleTab& ) const=0 ;
  virtual DoubleVect& ajouter_multvect_(const DoubleVect&, DoubleVect& ) const=0 ;
  virtual DoubleVect& ajouter_multvectT_(const DoubleVect&, DoubleVect& ) const=0 ;
 
private :
  int est_definie_;
};
 
#endif