Redshift and contact forms

Abstract

It is shown that the redshift between two Cauchy surfaces in a globally hyperbolic spacetime equals the ratio of the associated contact forms on the space of light rays of that spacetime.

9 pages, 1 figure

References in corpus (2)

• Globally hyperbolic spacetimes can be defined as "causal" instead of "strongly causal"
• Linking and causality in globally hyperbolic spacetimes