Dynamics of theD-dimensional FRW-cosmological models within the superstring-generated gravity model

Details Dynamics of theD-dimensional FRW-cosmological models within the superstring-generated gravity model Dynamics of theD-dimensional FRW-cosmological models within the superstring-generated gravity model

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gregr..23..917d&link_type=abstract

General Relativity and Gravitation, Volume 23, Issue 8, pp.917-939

Mathematics

Logic

5

Scientific paper

We study the dynamics of the generalizedD-dimensional (D = 1+3+d) Friedman-Robertson-Walker (FRW) cosmological models in the framework of an extended gravity theory obtained by adding the Gauss-Bonnet term to the standard Einstein-Hilbert action. In our discussion we extensively use methods of dynamical systems. We consider models filled in with a perfect fluid obeying the equation of statep=(γ-1)ρ and vacuum but non-flat models. We present a detailed analysis of the ten dimensional model and in particular we study the vacuum case. Several phase portraits show how the evolution of this model depends on the parameterγ.

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