Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Lattice Perturbation Theory for $O(N)$-Symmetric $\sigma$-Models with
  General Nearest-Neighbour Action I. Conventional Perturbation Theory
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org