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gr-qc2013★ 4 cited
A characterization of causal automorphisms on two-dimensional Minkowski spacetime
Do-Hyung Kim
It is shown that causal automorphisms on two-dimensional Minkowski spacetime can be characterized by the invariance of the wave equations.
gr-qc2011★ 9 cited
A characterization of causal automorphisms by wave equations
Do-Hyung Kim
A characterization of causal automorphism on Minkowski spacetime is given by use of wave equation. The result shows that causal analysis of spacetime may be replaced by studies of…