A generalization of Dixon's description of extended bodies
A generalized plane wave metric
A principle involving the variation of the metric tensor in a stationary space-time of general relativity
A propos de la conjecture de la balle liquide en relativité générale
A scalar geodesic deviation equation and a phase theorem.
A study on the one parameter Lorentzian spherical motions.
An explicit determination of the non-self-adjoint wave equations on curved space-time that satisfy Huygens' principle. Part I : Petrov type N background space-times
An explicit determination of the Petrov type D spacetimes on which Weyl's neutrino equation and Maxwell's equations satisfy Huygens' principle
Application of the Weyl curvature tensor to description of the generalized Reissner-Nordstrøm space-time
The Weyl curvature tensor for the generalized Reissner-Nordstrοm space-time is determined and theorems related to the Penrose conjecture are proved.
Compatible flat metrics.
Concomitanza, conseguenti identità di struttura e leggi di conservazione
Conformal field theory
Constant curvature -spacetimes and projective structures
Nous illustrons une classification des espace-temps (2+1) globalement hyperboliques a courboure constant, en terms de certaines structures projectives complexes portées par les surfaces de niveau de leur temps cosmologique canonique. Ceci derive d’une theorie des rotations de Wick canoniques, developpée en collaboration avec Riccardo Benedetti [6], qui sera egalement brievement illustrée.
De Sitter-invariant field equations
Dérivations, formes et opérateurs usuels sur les champs spinoriels des variétés différentiables de dimension paire
Diffeomorphisms constructively associated with mutually diverging spacetimes which allow a natural identification of event points in general relativity. Part I
In questo lavoro si dà una definizione di divergenza fra cronotopi della Relatività Generale e si costruisce un criterio per l'identificazione dei punti eventi di cronotopi divergenti che appartengono ad una classe consistente con la presenza di campi elettromagnetici nel vuoto.
Differential forms as spinors
Differential spaces and singularities of space-time.
Dirac field on newtonian space-time
Distinguished linear connections in the Einstein-Schrödinger geometry of the second order.