Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Epilogue   The IAU Symposium 230, Populations of High Energy Sources in Galaxies, has
been a wide-spectrum affair, with talks discussing results from the soft X-ray
to the Gamma-ray range on virtually the entire universe, from our Galaxy to the
high redshift regions when first galaxies emerged. I do not name any presenter
in this summary, but concentrate on themes and results that I have found
striking.

5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph