Abstract
If we study the de Sitter universe with the methods of projective geometry, we obtain a new mechanics valid on a cosmic scale and for hyperdense matter. In this projective mechanics the mass varies with the space-time distance, and the linear and angular momentum are reunited in a single projective tensor.
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Arcidiacono, G. The de Sitter universe and mechanics. Gen Relat Gravit 8, 865–870 (1977). https://doi.org/10.1007/BF00759590
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DOI: https://doi.org/10.1007/BF00759590