Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wormholes in vacuum Brans-Dicke theory   It is shown that among the different classes of claimed static wormhole
solutions of the vacuum Brans-Dicke theory only Brans Class I solution with
coupling constant $\omega$ less than -1.5 (excluding the point $\omega =2$)
gives rise to physically viable traversable wormhole geometry. Usability of
this wormhole geometry for interstellar travel has been examined.

35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph