Geometries for Possible Kinematics

Details Geometries for Possible Kinematics Geometries for Possible Kinematics

2010-07-21

arxiv.org/abs/1007.3618v1

Physics

Mathematical Physics

40 pages, 7 figures

Scientific paper

The algebras for all possible Lorentzian and Euclidean kinematics with $\frak{so}(3)$ isotropy except static ones are re-classified. The geometries for algebras are presented by contraction approach. The relations among the geometries are revealed. Almost all geometries fall into pairs. There exists $t \leftrightarrow 1/(\nu^2t)$ 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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