Wednesday, January 16, 2013

1103.2083 (J. L. Flores et al.)

Isocausal spacetimes may have different causal boundaries    [PDF]

J. L. Flores, J. Herrera, M. Sanchez
We construct an example which shows that two isocausal spacetimes, in the sense introduced by Garc\'ia-Parrado and Senovilla, may have c-boundaries which are not equal (more precisely, not equivalent, as no bijection between the completions can preserve all the binary relations induced by causality). This example also suggests that isocausality can be useful for the understanding and computation of the c-boundary.
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