Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability of the Einstein static universe in modified Gauss-Bonnet
  gravity   We analyze the stability of the Einstein static universe by considering
homogeneous perturbations in the context of f(G) modified Gauss-Bonnet theories
of gravity. By considering a generic form of f(G), the stability region of the
Einstein static universe is parameterized by the linear equation of state
parameter w=p/rho and the second derivative f"(G) of the Gauss-Bonnet term.

16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn