Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CTA contributions to the 2012 Heidelberg Symposium on High Energy
  Gamma-Ray Astronomy   Compilation of CTA contributions to the proceedings of the 2012 Heidelberg
Symposium on High Energy Gamma-Ray Astronomy (Gamma 2012), which took place in
July 9-13, 2012, in Heidelberg, Germany

1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics