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SUMMARY:On stable exponential cosmological solutions with three different 
 Hubble-like parameters in EGB model with a Λ-term
DTSTART;VALUE=DATE-TIME:20201006T092000Z
DTEND;VALUE=DATE-TIME:20201006T094000Z
DTSTAMP;VALUE=DATE-TIME:20260306T201431Z
UID:indico-contribution-2110@cern.ch
DESCRIPTION:Speakers: Vladimir Ivashchuk ()\nWe consider a $D$-dimensional
   Einstein-Gauss-Bonnet model with a cosmological term $\\Lambda$  and two
  non-zero\nconstants: $\\alpha_1$ and $\\alpha_2$. We   restrict the metri
 cs to be diagonal ones and study a class of solutions\nwith  exponential t
 ime dependence of three scale factors\, governed by three non-coinciding H
 ubble-like parameters:\n$H \\neq 0$\, $h_1$ and $h_2$\, obeying to $m H + 
 k_1 h_1 + k_2 h_2 \\neq 0$ and corresponding to factor spaces of\ndimensio
 ns $m > 1$\, $k_1 > 1$ and $k_2 > 1$\, respectively ($D = 1 + m + k_1 + k_
 2$). We analyse two cases: \ni) $m   0$ and $\\alpha \\Lambda > 0$ obeys c
 ertain  restrictions\, e.g. upper and lower\nbounds. In case ii) explicit 
 relations for exact solutions are found. In both cases the subclasses of s
 table\nand non-stable solutions are singled out. For $m >2$ the case i) co
 ntains a subclass of solutions  describing\nan exponential expansion of  $
 3$-dimensional  subspace with Hubble parameter $H > 0$ and zero variation 
 of the effective gravitational constant $G$.\n\nhttps://indico.particle.me
 phi.ru/event/35/contributions/2110/
LOCATION:Zoom
URL:https://indico.particle.mephi.ru/event/35/contributions/2110/
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