Title of article :
Fermats principle, Morse theory and applications to the gravitational lens effect Original Research Article
Author/Authors :
Volker Perlick، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1997
Keywords :
general relativity , Lorentzian geometry , Fermatיs principle , Morse theory , gravitational lens effect , Sobolev spaces , geodesics
Journal title :
Nonlinear Analysis Theory, Methods & Applications
Journal title :
Nonlinear Analysis Theory, Methods & Applications
