Fermats principle, Morse theory and applications to the gravitational lens effect /

Eitemau Tebyg

• A variational theory for light rays in convex subsets of stably causal lorentzian manifolds /
  gan: Piccione, Paolo.
• A timelike extension of fermat's principle in general relativity. Comparisons with the lightlike case /
  gan: Giannoni, Fabio.
• On a morse theory for light rays without nondegeneracy assumptions /
  gan: Germinario, Anna.
• Some results about geodesics on lorentzian manifolds of splitting type /
  gan: Antonacci, Flavia.
• Stability of geodesic structures /
  gan: Beem, John K.