Abstract.
A new angular measure in Minkowski space is introduced. It is defined for a cone of any dimension, is additive and invariant under invertible linear transformations. For the dimension 2, it has a clear interpretation as an “amount of rotation” in the Minkowski space from a direction to another one.
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Dekster, B.V. An angle in Minkowski space. J. Geom. 80, 31–47 (2004). https://doi.org/10.1007/s00022-004-1659-9
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DOI: https://doi.org/10.1007/s00022-004-1659-9