Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Acceleration of particles as universal property of rotating black holes   We argue that the possibility of having infinite energy in the centre of mass
frame of colliding particles is a generic property of rotating black holes. We
suggest a general model-independent derivation valid for "dirty" black holes.
The earlier observations for the Kerr or Kerr-Newman metrics are confirmed and
generalized.

18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph