Addendum: Symmetries of the energy-momentum tensor
arXiv:gr-qc/0410136 · doi:10.1063/1.1777404
Abstract
In recent papers [1-3], we have discussed matter symmetries of non-static spherically symmetric spacetimes, static plane symmetric spacetimes and cylindrically symmetric static spacetimes. These have been classified for both cases when the energy-momentum tensor is non-degenerate and also when it is degenerate. Here we add up some consequences and the missing references about the Ricci tensor.
7 pages, no figure, LaTex