Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the cellular decomposition and the Lusternik-Schnirelmann category of
  $Spin(7)$   We give a cellular decomposition of the compact connected Lie group
$Spin(7)$. We also determine the L-S categories of $Spin(7)$ and $Spin(8)$.

17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess