Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The homotopy types of $Sp(2)$-gauge groups over closed, simply-connected
  four-manifolds   We determine the number of distinct fibre homotopy types for the gauge groups
of principal $Sp(2)$-bundles over a closed, simply-connected four-manifold.

27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ