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Gambi Fernández, José María ; Romero Pérez, Mª Pilar ; San Miguel, A. ; Vicente, F. | Plenum | 1991-08A relativistic description for the transformation under a change of baseline between the Fermi coordinates associated to two nonrotating local reference frames is carried out by using techniques based on the world function and the parallel propa[...]texto impreso
A topological description of the stable causality condition on a spacetime is given. The structure of the subsets that, for a given point, control the fulfillment of strong and stable causality conditions at that point are studied. Separation pr[...]texto impreso
The effect of nonlinear terms in the Dirac equation is investigated, in the case of the hydrogen atom. It is found that the change in the energy is of order ?6 for a very large range of values of the coupling constant of the dominant term. It is[...]texto impreso
A reductive homogeneous space M = P/G is considered, endowed with an invariant connection, i.e., such that all left translations of M induced by members of P preserve it. We study the set of singularities of such connections giving sufficient co[...]