The construction of Penrose is based on twistor-theoretical ideas, and motivated by the linearized gravity
integrals for energy-momentum and angular momentum. Since, however, twistor-theoretical ideas and basic
notions are still considered ‘special knowledge’, the review here of the basic idea behind the Penrose
construction is slightly more detailed than that of the others. The main introductory references of the field
are the volumes [425, 426] by Penrose and Rindler on ‘Spinors and Spacetime’, especially volume 2, the
very readable book by Hugget and Tod [277] and the comprehensive review article [516
] by
Tod.
http://www.livingreviews.org/lrr-2009-4 |
Living Rev. Relativity 12, (2009), 4
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