Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spherically symmetric solutions in four-dimensional Poincar\'e gravity
  with non-trivial torsion   We study a four-dimensional gauge theory of the Poincar\'e group with
topological action which generalizes some well-known two-dimensional gravity
models. We classify the spherically symmetric solutions and discuss the
perturbative propagation of excitations around flat spacetime.

0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol