The Principle of Equivalence and Cosmological Metrics

Graham Stanley Hall, D. P. Lonie

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


This paper is concerned with the extent to which the geodesics of space-time (that is, the experimental consequences of the principle of equivalence) determine the metric in general relativity theory and, in particular, in Friedmann-Robertson-Walker-Lemaitre (FRWL) space-times. Thus it discusses projective structure in these space-times. The approach will be from a geometrical point of view and it is shown that if two space-time metrics share the same (unparametrized) geodesics and one is a (generic) FRWL metric then so is the other and that each is a member of a well defined family of projectively related (FRWL) metrics. Similar techniques are then applied to study the existence and properties of symmetries of the Weyl projective tensor and projective symmetries in FRWL space-times.
Original languageEnglish
Article number022502
Number of pages13
JournalJournal of Mathematical Physics
Issue number2
Publication statusPublished - 2008


  • Particle-theory and field-theory models of the early Universe
  • Spacetime topology
  • causal structure
  • spinor structure
  • Geometry
  • differential geometry
  • topology


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