Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-04-07
Gen.Rel.Grav. 33 (2001) 1245-1255
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 pages, Latex
Scientific paper
We propose an approach for constructing spatial slices of (3+1) spacetimes with cosmological constant but without a matter content, which yields (2+1) vacuum with $\Lambda$ solutions. The reduction mechanism from (3+1) to (2+1) gravity is supported on a criterion in which the Weyl tensor components are required to vanish together with a dimensional reduction via an appropriate foliation. By using an adequate reduction mechanism from the Pleba\'nski-Carter[A] solution in (3+1) gravity, the (2+1) BTZ solution can be obtained.
Cataldo Mauricio M.
del Campo Sergio
Garcia Arnaldo
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