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The nature of singularity in multidimensional anisotropic Gauss-Bonnet cosmology with a perfect fluid

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arxiv 0906.0140 v1 pith:KL6GHHIK submitted 2009-05-31 gr-qc

I.V. Kirnos , A.N. Makarenko , S.A. Pavluchenko , A.V. Toporensky This is my paper · ORCID
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keywords singularityanisotropicbeendimensionalfluidfoundgauss-bonnetperfect
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abstract

We investigate dynamics of (4+1) and (5+1) dimensional flat anisotropic Universe filled by a perfect fluid in the Gauss-Bonnet gravity. An analytical solutions valid for particular values of the equation of state parameter $w=1/3$ have been found. For other values of $w$ structure of cosmological singularity have been studied numerically. We found that for $w > 1/3$ the singularity is isotropic. Several important differences between (4+1) and (5+1) dimensional cases are discussed.

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  1. Cosmological dynamics based on Lovelock's gravity. Qualitative analysis

    gr-qc 2026-08 conditional novelty 5.0 of 10

    For flat FRW universes in Lovelock gravity, the dynamics reduces to a single first-order ODE whose fixed and singular points classify all evolutions, including a new 'Big Shock' initial state for N>4 with negative couplings.

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