Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Naked singularities in cylindrical collapse of counter-rotating dust
  shells   Solutions describing the gravitational collapse of asymptotically flat
cylindrical and prolate shells of (null) dust are shown to admit globally naked
singularities.

0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat