A characterization of causal automorphisms on two-dimensional Minkowski spacetime
Do-Hyung Kim

TL;DR
This paper demonstrates that causal automorphisms in two-dimensional Minkowski spacetime can be characterized by their invariance of wave equations, providing a mathematical criterion for such transformations.
Contribution
It introduces a novel characterization of causal automorphisms based on wave equation invariance in 2D Minkowski spacetime.
Findings
Causal automorphisms preserve wave equations.
A new mathematical criterion for identifying causal automorphisms.
Enhanced understanding of spacetime symmetries in 2D Minkowski space.
Abstract
It is shown that causal automorphisms on two-dimensional Minkowski spacetime can be characterized by the invariance of the wave equations.
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