Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on subgroup coverings of finite groups   In this note we determine the finite groups that can be written as the union
of any three irredundant/distinct proper subgroups. The finite groups that can
uniquely be written as the union of three proper subgroups are also
characterized.

35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
1
The categories of this paper are: cs