On the SO(2,1) symmetry in General Relativity
arXiv:gr-qc/0202018 · doi:10.1088/0264-9381/19/12/315
Abstract
The role of the SO(2,1) symmetry in General Relativity is analyzed. Cosmological solutions of Einstein field equations invariant with respect to a space-like Lie algebra G_r, with r between 3 and 6 and containing so(2,1) as a subalgebra, are also classified.
10 pages, latex, no figures