Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The beginning of cosmic ray astronomy   We discuss the anisotropic arrival directions of the ultra high energy cosmic
rays detected by Auger which I consider one of the biggest discoverie in
astrophysics during the last year.

30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci