127 citations
- University of AberdeenGB4 papers
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gr-qc2010★ 13 cited
Projective Structure and Holonomy in 4-dimensional Lorentz Manifolds
Graham S. Hall, David P. Lonie
This paper studies the situation when two 4-dimensional Lorentz manifolds (that is, space-times) admit the same (unparametrised) geodesics, that is, when they are projectively rela…
gr-qc2003★ 49 cited
Holonomy groups and spacetimes
G. S. Hall, D. P. Lonie
A study is made of the possible holonomy group types of a space-time for which the energy-momentum tensor corresponds to a null or non-null electromagnetic field, a perfect fluid o…