Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stable exponential cosmological solutions with three different
  Hubble-like parameters in EGB model with a $\Lambda$-term   We consider a $D$-dimensional Einstein-Gauss-Bonnet model with a cosmological
term $\Lambda$ and two non-zero constants: $\alpha_1$ and $\alpha_2$. We
restrict the metrics to be diagonal ones and study a class of solutions with
exponential time dependence of three scale factors, governed by three
non-coinciding Hubble-like parameters: $H \neq 0$, $h_1$ and $h_2$, obeying $m
H + k_1 h_1 + k_2 h_2 \neq 0$ and corresponding to factor spaces of dimensions
$m > 1$, $k_1 > 1$ and $k_2 > 1$, respectively ($D = 1 + m + k_1 + k_2$). We
analyse two cases: i) $m < k_1 < k_2$ and ii) $1< k_1 = k_2 = k$, $k \neq m$.
We show that in both cases the solutions exist if $\alpha = \alpha_2 / \alpha_1
> 0$ and $\alpha \Lambda > 0$ satisfies certain restrictions, e.g. upper and
lower bounds. In case ii) explicit relations for exact solutions are found. In
both cases the subclasses of stable and non-stable solutions are singled out.
For $m > 3$ the case i) contains a subclass of solutions describing an
exponential expansion of $3$-dimensional subspace with Hubble parameter $H > 0$
and zero variation of the effective gravitational constant $G$. The case $H =
0$ is also considered.

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The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th