Computer Science
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gregr..12..545d&link_type=abstract
General Relativity and Gravitation, Volume 12, Issue 7, pp.545-562
Computer Science
8
Scientific paper
In this communication, the mutual connections between quantities that are generalizations of the notion of a Killing vector field are investigated. A classification of these quantities in terms of a complex vector fieldα a is given. A common feature of all these quantities is that they imply the existence of a pair of shearfree geodetic null congruences. There are no explicit restrictions posed on the Ricci tensor.
Dietz Werner
Rüdiger R.
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