Energy in Reboucas-Tiomno-Korotkii-Obukhov and Godel-type space-times in Bergmann-Thomson's formulations

We calculate the total energy (the matter plus fields) of the universe considering Bergmann-Thomson's energy-momentum formulation in both Einstein's theory of general relativity and tele-parallel gravity on two different space-times; namely Reboucas-Tiomno-Korotkii-Obukhov and the Godel-type metrics. We also compute some kinematical quantities for these space-times and find that these space-times have shear-free expansion and non-vanishing four-acceleration and vorticity. Different approximations of the Bergmann-Thomson energy-momentum formulation in these different gravitation theories give the same energy density and agree with each other. The results advocate the importance of energy-momentum definitions

The Momentum 4-Vector Imparted by Gravitational Waves in Bianchi-type Metrics

This paper has been removed by arXiv administrators because it plagiarizes gr-qc/0008034, "The Energy Distribution of the Bianchi Type I Universe," by I. Radinschi; Phys. Rev. D 41, 1086 (1990), "Energy associated with a Kerr-Newman black hole," by K.S. Virbhadra; and Braz. J. Phys. 30, 181 (2000), "On The Localization Of The Gravitational Energy," by N.P. Neto and P.I. Trajtenberg.Comment: This submission has been withdrawn by arXiv administrators due to inappropriate text reuse from external source