On some Ricci-flat metrics of cohomogeneity two on complex line bundles.
On space-time, reference frames and the structure of relativity groups
On space-times with commutative parings of vector fields.
On special optical modes and thermal issues in advanced gravitational wave interferometric detectors.
On the associative Nijenhuis relation.
On the asymptotic number of plane curves and alternating knots.
On the characteristic initial value problem for nonlinear symmetric hyperbolic systems, including Einstein equations [Book]
On the connectedness of the space of initial data for the Einstein equations.
On the differential equations of the classical and relativistic dynamics for certain generalised Lagrangian functions
One studies the differential equations of the movement of certain classical and relativistic systems for some special Lagrangian functions. One considers particularly the case in which the problem presents cyclic coordinates. Some electrodynamical applications are studied.
On the existence of geodesics in static Lorentz manifolds with singular boundary
On the functional equation ... (Short Communication).
On the geometrical structure of shock waves in general relativity
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 history of unified field theories.
On the invariance properties and the hamiltonian of the unified affine electromagnetism and gravitation theories
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.