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- W1501871979 abstract "Recently many authors have calculated the energy of the Friedman universes by using double index energy-momentum complexes in Cartesian comoving coordinates $(t,x,y,z)$ and concluded that the flat and closed Friedman universes are energy-free. We show in this paper by using Einstein canonical energy-momentum complex and by doing calculations in conformally flat coordinates that such conclusion is incorrect. The results obtained in this paper are compatible with the results of the our previous paper cite{Gar07} where we have used coordinate-independent averaged relative energy-momentum tensors to analyze Friedman universes." @default.
- W1501871979 created "2016-06-24" @default.
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- W1501871979 date "2007-08-21" @default.
- W1501871979 modified "2023-09-27" @default.
- W1501871979 title "On Energy of the Friedman Universes in Conformally Flat Coordinates" @default.
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