Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spinning ring wormholes: a classical model for elementary particles?   Static horizonless solutions to the Einstein--Maxwell field equations, with
only a circular cosmic string singularity, are extended to exact rotating
asymptotically flat solutions. The possible interpretation of these field
configurations as spinning elementary particles or as macroscopic rotating
cosmic rings is discussed.

27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin