Addendum: Symmetries of the energy-momentum tensor
نویسنده
چکیده
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. Keyword: Matter symmetries ∗e-mail: [email protected]
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