Relativistic Localizing Processes Bespeak an Inevitable Projective Geometry of Spacetime

Abstract : Surprisingly, the issue of events localization in spacetime is poorly understood and a fortiori realized even in the context of Einstein’s relativity. Accordingly, a comparison between observational data and theoretical expectations might then be strongly compromised. In the present paper, we give the principles of relativistic localizing systems so as to bypass this issue. Such systems will allow to locate users endowed with receivers and, in addition, to localize any spacetime event. These localizing systems are made up of relativistic auto-locating positioning sub-systems supplemented by an extra satellite. They indicate that spacetime must be supplied everywhere with an unexpected local four dimensional projective structure besides the well-known three dimensional relativistic projective one. As a result, the spacetime manifold can be seen as a generalized Cartan space modeled on a four dimensional real projective space, i.e., a spacetime with both a local four dimensional projective structure and a compatible (pseudo-)Riemannian structure. Localization protocols are presented in details, while possible applications to astrophysics are also considered.
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Contributeur : Jacques Rubin <>
Soumis le : lundi 21 août 2017 - 18:33:14
Dernière modification le : jeudi 11 janvier 2018 - 16:54:52


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  • HAL Id : hal-01575853, version 1



Jacques Rubin. Relativistic Localizing Processes Bespeak an Inevitable Projective Geometry of Spacetime. Work presented at the "5th Winter Workshop on Non-Perturbative Quantum Field Theory," (WWNPQFT) 2.. 2017. 〈hal-01575853〉



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