caa a22 4500 463196155 CHVBK 20180406164923.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10773-007-9445-8 doi (NATIONALLICENCE)springer-10.1007/s10773-007-9445-8 Gad Ragab Mathematics Department, Faculty of Science, Minia University, 61915, El-Minia, Egypt aut Energy and Momentum Densities of Cosmological Models, with Equation of State ρ [Elektronische Daten] μ , in General Relativity and Teleparallel Gravity [Ragab Gad] We calculated the energy and momentum densities of stiff fluid solutions, using Einstein, Bergmann-Thomson and Landau-Lifshitz energy-momentum complexes, in both general relativity and teleparallel gravity. In our analysis we get different results comparing the aforementioned complexes with each other when calculated in the same gravitational theory, either this is in general relativity and teleparallel gravity. However, interestingly enough, each complex's value is the same either in general relativity or teleparallel gravity. Our results sustain that (i)general relativity or teleparallel gravity are equivalent theories (ii)different energy-momentum complexes do not provide the same energy and momentum densities neither in general relativity nor in teleparallel gravity. In the context of the theory of teleparallel gravity, the vector and axial-vector parts of the torsion are obtained. We show that the axial-vector torsion vanishes for the space-time under study. Springer Science+Business Media, LLC, 2007 Energy and momentum densities nationallicence Stiff fluid solutions nationallicence Teleparallel gravity nationallicence International Journal of Theoretical Physics Springer US; http://www.springer-ny.com 46/12(2007-12-01), 3263-3274 0020-7748 46:12<3263 2007 46 10773 https://doi.org/10.1007/s10773-007-9445-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10773-007-9445-8 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Gad Ragab Mathematics Department, Faculty of Science, Minia University, 61915, El-Minia, Egypt aut NATIONALLICENCE 773 0- International Journal of Theoretical Physics Springer US; http://www.springer-ny.com 46/12(2007-12-01), 3263-3274 0020-7748 46:12<3263 2007 46 10773 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer