Abstract
The physical and geometrical realizations of algebras for all possible Lorentzian and Euclidean kinematics with so(3) isotropy are presented in contraction approach and then re-classified. All geometries associated with these realizations are also obtained by the contraction method. Further relations among the geometries are revealed. Most geometries fall into pairs. There exists t ⇔ 1/(ν2 t) correspondence in each pair. In the viewpoint of differential geometry, there are only 9 geometries, which have right signature and geometrical spatial isotropy. They are 3 relativistic geometries, 3 absolute-time geometries, and 3 absolute-space geometries.
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Huang, C., Tian, Y., Wu, X. et al. Geometries for possible kinematics. Sci. China Phys. Mech. Astron. 55, 1978–2003 (2012). https://doi.org/10.1007/s11433-012-4788-4
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DOI: https://doi.org/10.1007/s11433-012-4788-4