Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some features of electromagnetic field of charged particle revolving
  about dielectric ball   A relativistic electron uniformly rotating along an equatorial orbit around a
dielectric ball may generate Cherenkov radiation tens of times more intense as
that in case of revolution of a particle in a continuous, infinite and
transparent medium. The root-mean-square values of electric and magnetic field
strengths of particle are practically not localized in the central part of the
equatorial plane of ball and close to the poles of ball.

35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph