Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal Extra Dimension   This is a brief discussion of the following features of the Universal Extra
Dimension (UED) model: (i) Formulation, (ii) Indirect bounds, (iii) Collider
search and the Inverse Problem, (iv) Astrophysical bounds, and (v) UED with two
extra dimensions.

15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex