Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing the unitarity of the renormalizable theory of massive conformal
  gravity   The presence of an unstable massive spin-2 ghost state in the renormalizable
theory of massive conformal gravity leads to a pair of complex poles appearing
in the first sheet of the energy plane. Here we show that the positions of
these poles are gauge dependent, which makes the theory unitary.

9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg