On the geometry of null cones in Einstein-vacuum spacetimes
On the geometry of the relativistic electromagnetic fluid flows
On the Geroch group
On the Hawking wormhole horizon entropy.
On the mathematical structure of test relativistic magnetofluiddynamics
On the quadric CMC spacelike hypersurfaces in Lorentzian space forms
We deal with complete spacelike hypersurfaces immersed with constant mean curvature in a Lorentzian space form. Under the assumption that the support functions with respect to a fixed nonzero vector are linearly related, we prove that such a hypersurface must be either totally umbilical or isometric to a hyperbolic cylinder of the ambient space.
On the relation between the Einstein and the Komar expressions for the energy of the gravitational field
On the space-time permeated by a viscous, compressible, thermally conducting, self-gravitating fluid with infinite electrical conductivity and constant magnetic permeability
On the topology of spherically symmetric space-times
Spherically symmetric space-times have attained considerable attention ever since the early beginnings of the theory of general relativity. In fact, they have appeared already in the papers of K. Schwarzschild [12] and W. De Sitter [5] which were published in 1916 and 1917 respectively soon after Einstein's epoch-making work [7] in 1915. The present survey is concerned mainly with recent results pertainig to the toplogy of spherically symmetric space-times. Definition. By space-time a connected...
On the validity of Wilson's approach to general relativity
The Wilson scheme and the Einstein dynamics are compared for binary systems. At the second post-Newtonian approximation, genuine two-body aspects are found to differ by up to 114%.
On the wave equation in curved spacetime
On weakly symmetric spacetimes
Onde di discontinuità gravitazionali in relatività generale
Opérateur de diffraction pour le système de Maxwell en métrique de Schwarzschild
Operator equations, separation of variables and relativistic alterations.
Ordered Manifolds, Invariant Cone Fields, and Semigroups.