Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic Strings Coupled With a Massless Scalar Field   A scalar field generalization of Xanthopoulos's cylindrically symmetric
solutions of the vacuum Einstein equation is obtained. The obtained solution
preserves the properties of the Xanthopoulos solution, which are regular on the
axis, asymptotically flat and free from the curvature singularities. The
solution describes stable, infinite length of rotating cosmic string
interacting with gravitational and scalar waves.

31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th