461 citations
- Andrés Santos3 profiles39 · h 29
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gr-qc2011
A characterization of the electromagnetic stress-energy tensor
J. Navarro, J. B. Sancho
In a previous paper, we pointed out how a dimensional analysis of the stress-energy tensor of the gravitational field allows to derive the field equation of General Relativity. In…
gr-qc2007★ 20 cited
On the naturalness of Einstein's equation
Jose Navarro, Juan B. Sancho
We compute all 2-covariant tensors naturally constructed from a semiriemannian metric which are divergence-free and have weight greater than -2. As a consequence, it follows a char…
gr-qc2005★ 19 cited
Lightlike simultaneity, comoving observers and distances in general relativity
V. J. Bolós
We state a condition for an observer to be comoving with another observer in general relativity, based on the concept of lightlike simultaneity. Taking into account this condition,…