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arXiv 1407.8085gr-qcmath.DG
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关于建立时空几何基础的一个建议

A proposal of foundation of spacetime geometry

Romualdo Tresguerres

摘要:

度量仿射,局部庞加莱,特殊相对论和伽利略时空几何的一个共同的方法。从一个仿射复合丛,我们介绍了当地的参考系和它们的演变沿世界线和我们研究,绝对和相对的一致性假设,引起替代概念的时空。特别是闵可夫斯基度规的构造及其所要求的不变性,允许将原始仿射丛重新组织为具有明确洛伦兹对称性的度规-仿射几何,或者将其限制为庞加莱几何,这两种几何都构成了一大类引力规范理论的背景。

英文摘要:

A common approach to metric-affine, local Poincaré, special-relativistic and Galilei spacetime geometry is developed. Starting from an affine composite bundle, we introduce local reference frames and their evolution along worldlines and we study both, absolute and relative simultaneity postulates, giving rise to alternative concepts of spacetime. In particular, the construction of the Minkowski metric, and its required invariance, allows either to reorganize the original affine bundle as a metric-affine geometry with explicit Lorentz symmetry, or to restrict it to a Poincaré geometry, both of them constituting the background of a wide class of gauge theories of gravity.

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