Relativity without light: A new proof of Ignatowski's theorem
arXiv:2007.09301 · doi:10.1016/j.geomphys.2020.103871
Abstract
V. Ignatowski (1910) showed that assumptions about light are not necessary to obtain Lorentzian kinematics as one of only few possibilities. We give a much simplified proof of his result as formulated by V. Gorini (1971) for +1-dimensional space-time.
9 pages. Accepted version, to appear in Journal of Geometry and Physics