Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solutions to Yang-Mills equations   This article gives explicit solutions to the Yang-Mills equations. The
solutions have positive energy that can be made arbitrarily small by selection
of a parameter showing that Yang-Mills field theories do not have a mass gap.

13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph