Qualche osservazione sulle forze centrali in Relatività Ristretta
In Relatività Ristretta si caratterizzano le forze centrali per cui le orbite al finito sono necessariamente chiuse ed ellittiche, per qualunque valore dell'energia.
Quantum mechanics and coherent states on the anti-de Sitter spacetime and their Poincaré contraction
Quantum vacuum polarization at the Black-Hole horizon
Quasi-local energy-momentum and the Sen geometry of two-surfaces
We review the main ideas of the two dimensional Sen geometry and apply these concepts i. in finding the `most natural' quasi-local energy-momentum, ii. in characterizing the zero energy-momentum and zero mass configurations and iii. in finding the quasi-local radiative modes of general relativity.