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gr-qc2020
Observer-based invariants for cosmological models
Lode Wylleman, Alan Coley, David McNutt +1
We consider the equivalence problem for cosmological models in four-dimensional gravity theories. A cosmological model is considered as a triple consisting o…
gr-qc2020★ 7 cited
Poynting vector, super-Poynting vector, and principal observers in electromagnetism and general relativity
Lode Wylleman, L. Filipe O. Costa, José Natário
In electromagnetism, the concept of Poynting vector as measured by an observer is well known. A mathematical analogue in general relativity is the super-Poynting vector of the Weyl…