%0 Journal Article
%T Causal and conformal structures of globally hyperbolic spacetimes
%A Do-Hyung Kim
%J Mathematics
%D 2015
%I arXiv
%R 10.1016/j.geomphys.2015.06.015
%X The group of conformal diffeomorphisms and the group of causal automorphisms on two-dimensional globally hyperbolic spacetimes are clarified. It is shown that if spacetimes have non-compact Cauchy surfaces, then the groups are subgroups of that of two-dimensional Minkowski spacetime, and if spacetimes have compact Cauchy surfaces, then the groups are subgroups of that of two-dimensional Einstein's static universe.
%U http://arxiv.org/abs/1501.06979v1