AI Article Synopsis

  • The study explores a multidimensional Einstein-Gauss-Bonnet gravitational model, focusing on the interplay between its Gauss-Bonnet and cosmological terms.
  • It presents exact solutions characterized by exponential time dependence in two scale factors, linked to distinct Hubble-like parameters based on different dimensions.
  • Stability analysis indicates that under specific conditions, these solutions maintain stability, especially within a subset with minor variations in the effective gravitational constant.

Article Abstract

A [Formula: see text]-dimensional Einstein-Gauss-Bonnet gravitational model including the Gauss-Bonnet term and the cosmological term [Formula: see text] is considered. Exact solutions with exponential time dependence of two scale factors, governed by two Hubble-like parameters [Formula: see text] and [Formula: see text], corresponding to factor spaces of dimensions [Formula: see text] and [Formula: see text], respectively, are found. Under certain restrictions on [Formula: see text], the stability of the solutions in a class of cosmological solutions with diagonal metrics is proved. A subclass of solutions with small enough variation of the effective gravitational constant [Formula: see text] is considered and the stability of all solutions from this subclass is shown. This article is part of the theme issue 'The future of mathematical cosmology, Volume 1'.

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Source
http://dx.doi.org/10.1098/rsta.2021.0177DOI Listing

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