Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On stability of Friedmann-Lema\^itre-Robertson-Walker solutions in
  doubled geometries   Motivated by the models of geometry with discrete spaces as additional
dimensions we investigate the stability of cosmological solutions in models
with two metrics of the Friedmann-Lema\^itre-Robertson-Walker type. We propose
an effective gravity action that couples the two metrics in a similar manner as
in the bimetric theory of gravity and analyse whether standard solutions with
identical metrics are stable under small perturbations.

19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex