Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anharmonic O(N) oscillator model in next-to-leading order of the 1/N
  expansion   An extended Holstein-Primakoff mapping which incorporates both single- and
double boson mappings is used in the context of O(N+1) anharmonic oscillator
with the global symmetry broken down to O(N) to study the next-to-leading order
of the 1/N expansion. It is shown that the Goldstone theorem is obeyed to that
order and that the Ward identity is satisfied.

5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys