Title of article :
Periodic trajectories in lorentzian manifolds Original Research Article
Author/Authors :
Anna Maria Candela، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1997
Keywords :
periodic trajectories , general relativity , variational approach , Fermat principle , Ljusternik-Schnirelman category , relative category , Galerkin approximation , Lorentzian Manifolds
Journal title :
Nonlinear Analysis Theory, Methods & Applications
Journal title :
Nonlinear Analysis Theory, Methods & Applications