Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The end of the galactic cosmic ray spectrum   We discuss the region of transition between galactic and extragalactic cosmic
rays. The exact shapes and compositions of these two components contains
information about important parameters of powerful astrophysical sources and
the conditions in extragalactic space as well as for the cosmological evolution
of the sources of high energy cosmic rays. Several types of experimental data,
including the exact shape of the ultrahigh energy cosmic rays, their chemical
composition and their anisotropy, and the fluxes of cosmogenic neutrinos have
to be included in the solution of this problem.

16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg