Abstract
It is shown that continuous causal isomorphisms on two-dimensional Minkowski spacetime can be characterized by the invariance of wave equations.
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Acknowledgements
The present research was conducted by the research fund of Dankook University in 2014.
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Kim, DH. On continuous causal isomorphisms on two-dimensional Minkowski spacetimes. Gen Relativ Gravit 49, 41 (2017). https://doi.org/10.1007/s10714-017-2206-y
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DOI: https://doi.org/10.1007/s10714-017-2206-y