Affine Geometry and Relativity

Foundations of Physics 53 (3):1-29 (2023)
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Abstract

We present the basic concepts of space and time, the Galilean and pseudo-Euclidean geometry. We use an elementary geometric framework of affine spaces and groups of affine transformations to illustrate the natural relationship between classical mechanics and theory of relativity, which is quite often hidden, despite its fundamental importance. We have emphasized a passage from the group of Galilean motions to the group of Poincaré transformations of a plane. In particular, a 1-parametric family of natural deformations of the Poincaré group is described. We also visualized the underlying groups of Galilean, Euclidean, and pseudo-Euclidean rotations within the special linear group.

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Classical mechanics in Galilean space-time.Ray E. Artz - 1981 - Foundations of Physics 11 (9-10):679-697.

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