Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the limiting energy of the collision of elementary particles close to
  horizon of the rotating black hole   Arguments are given for the conclusion that the energy of collision of two
ultrarelativistic elementary particles due to gravitational radiation cannot
exceed the Planck value. Comparison of the gravitational and electromagnetic
radiation for charged particles close to the horizon of Kerr black hole is
made. If for trans-Planckian energy the black hole can arise it is shown that
the energy growth used in scattering for interaction of particles is still
limited.

22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat