Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic phase transition in CoO confined to a vycor type porous glass.
  Neutron diffraction study   Neutron diffraction studies of antiferromagnetic CoO confined to a vycor type
porous glass demonstrate a continuous magnetic phase transition with a
decreased N\'eel temperature and reduced magnetic moment as compared with the
bulk.

6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int