2 papers
math.DS2004
Orthogonal Geodesic Chords, Brake Orbits and Homoclinic Orbits in Riemannian Manifolds
Roberto Giambó, Fabio Giannoni, Paolo Piccione
The study of solutions with fixed energy of certain classes of Lagrangian (or Hamiltonian) systems is reduced, via the classical Maupertuis--Jacobi variational principle, to the st…
gr-qc2004
Comment on "Spherically symmetric perfect fluid in area-radial coordinates" by Iguchi et al
Roberto Giambo', Fabio Giannoni, Giulio Magli +1
In this short note we comment about some criticisms - appeared in a recent paper by Iguchi et al - to our previous works on gravitational collapse of perfect fluids. We show that t…