1 J.P.Petit : 1998.  Les groupes dynamiques de la physique  2 J.P.Petit and P.Midy: 1998 . Geometrization of matter and antimatter through coadjoint action of a group on its momentum space. 1: Charges as additional scalar components of the momentum of a group acting on a 10 d - space. Geometrical definition of antimatter 3 J.P.Petit and P.Midy :  1998. Geometrization of matter and antimatter through coadjoint action of a group on its momentum space. 2: Geometrical description of Dirac's antimatter 4 J.P.Petit and P.Midy : 1998. Geometrization of matter and antimatter through coadjoint action of a group on its momentum space. 3: Geometrical description of Dirac's antimatter. A first geometrical interpretation of antimatter after Feynmann and so-called CPT-theorem 5 J.P.Petit and P.Midy : 1998. Geometrization of matter and antimatter through coadjoint action of a group on its momentum space. 4: The twin group. Geometrical description of Dirac's antimatter. Geometrical interpretation of antimatter after Feynmann and so-called CPT-theorem   En préparation :   - The problem of the solar neutrino deficit - Towards a 4-folds description of the universe