Covariance and meaning
| dc.creator | Bel, Ll. | |
| dc.date | 2007-11-20 | |
| dc.date | 2007-12-05 | |
| dc.date.accessioned | 2026-07-07T08:47:06Z | |
| dc.date.available | 2026-07-07T08:47:06Z | |
| dc.description | Several other factors, besides the intrinsic local geometry, contribute to give a meaning to a space-time model. The simplest example comes from comparing Minkowski's and Milne's model, that both have a null Riemann tensor. We add to these two models a third one which describes a time-dependent locally-Minkowskian spherically symmetric space-time on which every test-particle at rest with respect to the center of symmetry sustains a constant force. Although the model is globally grossly un-realistic we think that it can be helpful to describe a local perturbation of an homogeneous cosmological model. Or as a substitute to the very far away asymptotic Minkowskian behavior usually assumed to describe the gravitational field of compact spherical bodies. | |
| dc.description | 10 pages, Corrected typos, Changed example | |
| dc.identifier | https://arxiv.org/abs/0711.3110 | |
| dc.identifier | http://arxiv.org/abs/0711.3110 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/143483 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Covariance and meaning | |
| dc.type | text |