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gr-qc2023
How to detect the spacetime curvature without rulers and clocks. II. Three-dimensional spacetime
A. V. Nenashev, S. D. Baranovskii
We have generalized the results of the previous work [arXiv:2302.12209] to the case of three-dimensional (3D) spacetime with two spatial and one temporal coordinates. We have found…
gr-qc2023
How to detect the spacetime curvature without rulers and clocks
A. V. Nenashev, S. D. Baranovskii
We demonstrate how one can distinguish a curved 4-dimensional spacetime from a flat one, when it is possible, relying only on the causality relations between events. It is known th…