Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bimetric gravity doubly coupled to matter: theory and cosmological
  implications   A ghost-free theory of gravity with two dynamical metrics both coupled to
matter is shown to be consistent and viable. Its cosmological implications are
studied, and the models, in particular in the context of partially massless
gravity, are found to explain the cosmic acceleration without resorting to dark
energy.

31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga