Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unconventional critical state in YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ thin
  films with a vortex-pin lattice fabricated by masked He$^+$ ion beam
  irradiation
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci